abdoosh1000/training-batch-1 · Datasets at Hugging Face

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The pentahalides SbF	wikitext
5 have trigonal bipyramidal molecular geometry in the gas phase , but in the liquid phase , SbF	wikitext
5 is polymeric , whereas SbCl	wikitext
5 is monomeric . SbF	wikitext
5 is a powerful Lewis acid used to make the <unk> <unk> acid ( " <unk> " ) .	wikitext
Oxyhalides are more common for antimony than arsenic and phosphorus . Antimony trioxide dissolves in concentrated acid to form <unk> compounds such as <unk> and ( SbO )	wikitext
= = = <unk> , hydrides , and organoantimony compounds = = =	wikitext
Compounds in this class generally are described as derivatives of Sb3 − . Antimony forms antimonides with metals , such as indium antimonide ( <unk> ) and silver antimonide ( Ag	wikitext
<unk> ) . The alkali metal and zinc antimonides , such as <unk> and <unk> , are more reactive . Treating these antimonides with acid produces the unstable gas stibine , <unk>	wikitext
Sb3 − + 3 H + → <unk>	wikitext
<unk> can also be produced by treating Sb3 + salts with hydride reagents such as sodium <unk> decomposes spontaneously at room temperature . Because stibine has a positive heat of formation , it is thermodynamically unstable and thus antimony does not react with hydrogen directly .	wikitext
<unk> compounds are typically prepared by alkylation of antimony halides with Grignard reagents . A large variety of compounds are known with both Sb ( III ) and Sb ( V ) centers , including mixed chloro @-@ organic derivatives , anions , and cations . Examples include Sb ( C6H5 ) 3 ( <unk> ) , Sb2 ( C6H5 ) 4 ( with an Sb @-@ Sb bond ) , and cyclic [ Sb ( C6H5 ) ] n . <unk> organoantimony compounds are common , examples being Sb ( C6H5 ) 5 and several related halides .	wikitext
= = History = =	wikitext
Antimony ( III ) sulfide , Sb2S3 , was recognized in predynastic Egypt as an eye cosmetic ( kohl ) as early as about 3100 BC , when the cosmetic palette was invented .	wikitext
An artifact , said to be part of a vase , made of antimony dating to about 3000 BC was found at <unk> , Chaldea ( part of present @-@ day Iraq ) , and a copper object plated with antimony dating between 2500 BC and 2200 BC has been found in Egypt . Austen , at a lecture by Herbert Gladstone in 1892 commented that " we only know of antimony at the present day as a highly brittle and crystalline metal , which could hardly be fashioned into a useful vase , and therefore this remarkable ' find ' ( artifact mentioned above ) must represent the lost art of rendering antimony malleable . "	wikitext
<unk> was unconvinced the artifact was indeed a vase , mentioning that <unk> , after his analysis of the Tello object ( published in 1975 ) , " attempted to relate the metal to Transcaucasian natural antimony " ( i.e. native metal ) and that " the antimony objects from Transcaucasia are all small personal ornaments . " This weakens the evidence for a lost art " of rendering antimony malleable . "	wikitext
The Roman scholar Pliny the Elder described several ways of preparing antimony sulfide for medical purposes in his treatise Natural History . Pliny the Elder also made a distinction between " male " and " female " forms of antimony ; the male form is probably the sulfide , while the female form , which is superior , heavier , and less friable , has been suspected to be native metallic antimony .	wikitext
The Roman naturalist Pedanius Dioscorides mentioned that antimony sulfide could be roasted by heating by a current of air . It is thought that this produced metallic antimony .	wikitext
The first description of a procedure for isolating antimony is in the book De la <unk> of 1540 by Vannoccio Biringuccio ; this predates the more famous 1556 book by Agricola , De re metallica . In this context Agricola has been often incorrectly credited with the discovery of metallic antimony . The book <unk> <unk> <unk> ( The Triumphal Chariot of Antimony ) , describing the preparation of metallic antimony , was published in Germany in 1604 . It was purported to have been written by a Benedictine monk , writing under the name Basilius Valentinus , in the 15th century ; if it were authentic , which it is not , it would predate Biringuccio .	wikitext
The metal antimony was known to German chemist Andreas Libavius in 1615 who obtained it by adding iron to a molten mixture of antimony sulfide , salt and potassium tartrate . This procedure produced antimony with a crystalline or starred surface .	wikitext
With the advent of challenges to phlogiston theory it was recognized that antimony is an element forming sulfides , oxides , and other compounds , as is the case with other metals .	wikitext
The first natural occurrence of pure antimony in the Earth 's crust was described by the Swedish scientist and local mine district engineer Anton von <unk> in 1783 ; the type @-@ sample was collected from the Sala Silver Mine in the <unk> mining district of Sala , <unk> , Sweden .	wikitext
= = = Etymology = = =	wikitext
The ancient words for antimony mostly have , as their chief meaning , kohl , the sulfide of antimony .	wikitext
The Egyptians called antimony <unk> ; in hieroglyphs , the vowels are uncertain , but there is an Arabic tradition that the word is <unk> <unk> . The Greek word , <unk> stimmi , is probably a loan word from Arabic or from Egyptian <unk>	wikitext
and is used by Attic tragic poets of the 5th century BC ; later Greeks also used <unk> <unk> , as did Celsus and Pliny , writing in Latin , in the first century AD . Pliny also gives the names <unk> [ sic ] , <unk> , alabaster , and the " very common " <unk> , " wide @-@ eye " ( from the effect of the cosmetic ) . Later Latin authors adapted the word to Latin as stibium . The Arabic word for the substance , as opposed to the cosmetic , can appear as <unk> <unk> , <unk> , <unk> , or <unk> . <unk> suggests the first form , which is the earliest , derives from <unk> , an accusative for stimmi .	wikitext
The use of Sb as the standard chemical symbol for antimony is due to Jöns Jakob Berzelius , who used this abbreviation of the name stibium . The medieval Latin form , from which the modern languages and late Byzantine Greek take their names for antimony , is antimonium . The origin of this is uncertain ; all suggestions have some difficulty either of form or interpretation . The popular etymology , from <unk> anti @-@ <unk> or French <unk> , still has adherents ; this would mean " monk @-@ killer " , and is explained by many early alchemists being monks , and antimony being poisonous .	wikitext
Another popular etymology is the hypothetical Greek word <unk> <unk> , " against aloneness " , explained as " not found as metal " , or " not found unalloyed " . Lippmann conjectured a hypothetical Greek word <unk> <unk> , which would mean " <unk> " , and cites several examples of related Greek words ( but not that one ) which describe chemical or biological efflorescence .	wikitext
The early uses of antimonium include the translations , in 1050 – 1100 , by Constantine the African of Arabic medical treatises . Several authorities believe antimonium is a scribal corruption of some Arabic form ; <unk> derives it from <unk> ; other possibilities include <unk> , the Arabic name of the metalloid , and a hypothetical as @-@ stimmi , derived from or parallel to the Greek .	wikitext
= = Production = =	wikitext
= = = Top producers and production volumes = = =	wikitext
The British Geological Survey ( BGS ) reported that in 2005 , China was the top producer of antimony with an approximately 84 % world share , followed at a distance by South Africa , Bolivia and Tajikistan . <unk> Mine in Hunan province has the largest deposits in China with an estimated deposit of 2 @.@ 1 million metric tons .	wikitext
In 2010 , according to the US Geological Survey , China accounted for 88 @.@ 9 % of total antimony production with South Africa , Bolivia and Russia sharing the second place .	wikitext
However , Roskill Consulting estimates for primary production show that in 2010 China held a 76 @.@ 75 % share of world supply with 120 @,@ 462 tonnes ( 90 @,@ 000 tonnes of reported and 30 @,@ 464 tonnes of un @-@ reported production ) , followed by Russia ( 4 @.@ 14 % share , 6 @,@ 500 tonnes of production ) , Myanmar ( 3 @.@ 76 % share , 5 @,@ 897 tonnes ) , Canada ( 3 @.@ 61 % share , 5 @,@ 660 tonnes ) , Tajikistan ( 3 @.@ 42 % share , 5 @,@ 370 tonnes ) and Bolivia ( 3 @.@ 17 % share , 4 @,@ 980 tonnes ) .	wikitext
Roskill estimates that secondary production globally in 2010 was 39 @,@ 540 tonnes .	wikitext
Antimony was ranked first in a Risk List published by the British Geological Survey in the second half of 2011 . The list provides an indication of the relative risk to the supply of chemical elements or element groups required to maintain the current British economy and lifestyle .	wikitext
Also , antimony was identified as one of 12 critical raw materials for the EU in a report published in 2011 , primarily due to the lack of supply outside China .	wikitext
Reported production of antimony in China fell in 2010 and is unlikely to increase in the coming years , according to the Roskill report . No significant antimony deposits in China have been developed for about ten years , and the remaining economic reserves are being rapidly depleted .	wikitext
The world 's largest antimony producers , according to Roskill , are listed below :	wikitext
= = = Reserves = = =	wikitext
According to statistics from the USGS , current global reserves of antimony will be depleted in 13 years . However , the USGS expects more resources will be found .	wikitext
= = = Production process = = =	wikitext
The extraction of antimony from ores depends on the quality of the ore and composition of the ore . Most antimony is mined as the sulfide ; lower @-@ grade ores are concentrated by froth flotation , while higher @-@ grade ores are heated to 500 – 600 ° C , the temperature at which stibnite melts and is separated from the gangue minerals . Antimony can be isolated from the crude antimony sulfide by a reduction with scrap iron :	wikitext
3 + 3 Fe → 2 Sb + 3 FeS	wikitext
The sulfide is converted to an oxide and advantage is often taken of the volatility of antimony ( III ) oxide , which is recovered from roasting . This material is often used directly for the main applications , impurities being arsenic and sulfide . Isolating antimony from its oxide is performed by a carbothermal reduction :	wikitext
3 + 3 C → 4 Sb + 3 CO	wikitext
The lower @-@ grade ores are reduced in blast furnaces while the higher @-@ grade ores are reduced in reverberatory furnaces .	wikitext
= = Applications = =	wikitext
About 60 % of antimony is consumed in flame retardants , and 20 % is used in alloys for batteries , plain bearings and solders .	wikitext
= = = Flame retardants = = =	wikitext
Antimony is mainly used as its trioxide in making flame @-@ proofing compounds . It is nearly always used in combination with halogenated flame retardants , with the only exception being in halogen @-@ containing polymers . The formation of halogenated antimony compounds is the cause for the flame retarding effect of antimony trioxide , due to reaction of these compounds with hydrogen atoms and probably also with oxygen atoms and OH radicals , thus inhibiting fire . Markets for these flame @-@ retardant applications include children 's clothing , toys , aircraft and automobile seat covers . It is also used in the fiberglass composites industry as an additive to polyester resins for such items as light aircraft engine covers . The resin will burn while a flame is held to it but will extinguish itself as soon as the flame is removed .	wikitext
= = = Alloys = = =	wikitext
Antimony forms a highly useful alloy with lead , increasing its hardness and mechanical strength . For most applications involving lead , varying amounts of antimony are used as alloying metal . In lead – acid batteries , this addition improves the charging characteristics and reduces generation of unwanted hydrogen during charging . It is used in <unk> alloys ( such as Babbitt metal ) , in bullets and lead shot , cable sheathing , type metal ( for example , for linotype printing machines ) , solder ( some " lead @-@ free " solders contain 5 % Sb ) , in pewter , and in hardening alloys with low tin content in the manufacturing of organ pipes .	wikitext
= = = Other applications = = =	wikitext
Three other applications make up nearly all the rest of the consumption . One of these uses is as a stabilizer and a catalyst for the production of <unk> . Another application is to serve as a fining agent to remove microscopic bubbles in glass , mostly for TV screens ; this is achieved by the interaction of antimony ions with oxygen , interfering the latter from forming bubbles . The third major application is the use as pigment .	wikitext
Antimony is being increasingly used in the semiconductor industry as a dopant for heavily doped n @-@ type silicon wafers in the production of diodes , infrared detectors , and Hall @-@ effect devices . In the 1950s , tiny beads of a lead @-@ antimony alloy were used to dope the emitters and collectors of n @-@ p @-@ n alloy junction transistors with antimony . <unk> antimonide is used as a material for mid @-@ infrared detectors .	wikitext
Few biological or medical applications exist for antimony . Treatments principally containing antimony are known as <unk> and are used as <unk> . Antimony compounds are used as <unk> drugs . Potassium <unk> tartrate , or tartar emetic , was once used as an anti @-@ <unk> drug from 1919 on . It was subsequently replaced by <unk> . Antimony and its compounds are used in several veterinary preparations like <unk> or lithium antimony <unk> , which is used as a skin conditioner in ruminants . Antimony has a nourishing or conditioning effect on keratinized tissues , at least in animals .	wikitext
Antimony @-@ based drugs , such as <unk> <unk> , are also considered the drugs of choice for treatment of leishmaniasis in domestic animals . Unfortunately , as well as having low therapeutic indices , the drugs are poor at penetrating the bone marrow , where some of the Leishmania amastigotes reside , and so cure of the disease – especially the visceral form – is very difficult . Elemental antimony as an antimony pill was once used as a medicine . It could be reused by others after ingestion and elimination .	wikitext
In the heads of some safety matches , antimony ( III ) sulfide is used . Antimony @-@ 124 is used together with beryllium in neutron sources ; the gamma rays emitted by antimony @-@ 124 initiate the photodisintegration of beryllium . The emitted neutrons have an average energy of 24 keV . Antimony sulfides have been shown to help stabilize the friction coefficient in automotive brake pad materials .	wikitext
Antimony also is used in the making of bullets and bullet tracers . This element is also used in paint and glass art crafts and as opacifier in enamel .	wikitext
= = Precautions = =	wikitext
The effects of antimony and its compounds on human and environmental health differ widely . The massive antimony metal does not affect human and environmental health . Inhalation of antimony trioxide ( and similar poorly soluble Sb ( III ) dust particles such as antimony dust ) is considered harmful and suspected of causing cancer . However , these effects are only observed with female rats and after long @-@ term exposure to high dust concentrations . The effects are hypothesized to be attributed to inhalation of poorly soluble Sb particles leading to impaired lung clearance , lung overload , inflammation and ultimately tumour formation , not to exposure to antimony ions ( OECD , 2008 ) . Antimony chlorides are corrosive to skin . The effects of antimony are not comparable to arsenic ; this might be caused by the significant differences of uptake , metabolism and excretion between arsenic and antimony .	wikitext
For oral absorption , <unk> ( 1994 ) recommended values of 10 % for tartar emetic and 1 % for all other antimony compounds . Dermal absorption for metals is estimated at most 1 % ( <unk> , 2007 ) . Inhalation absorption of antimony trioxide and other poorly soluble Sb ( III ) substances ( such as antimony dust ) is estimated at 6 @.@ 8 % ( OECD , 2008 ) , whereas a value < 1 % is derived for Sb ( V ) substances . Antimony ( V ) is not quantitatively reduced to antimony ( III ) in the cell , and both species exist simultaneously .	wikitext
Antimony is mainly excreted from the human body via urine . Antimony and its compounds do not cause acute human health effects , with the exception of antimony potassium tartrate ( " tartar emetic " ) , a prodrug that is intentionally used to treat leishmaniasis patients .	wikitext
Prolonged skin contact with antimony dust may cause dermatitis . However , it was agreed at the European Union level that the skin rashes observed are not substance @-@ specific , but most probably due to a physical blocking of sweat ducts ( ECHA / PR / 09 / 09 , Helsinki , 6 July 2009 ) . Antimony dust may also be explosive when dispersed in the air ; when in a bulk solid it is not combustible .	wikitext
Antimony is incompatible with strong acids , halogenated acids , and oxidizers ; when exposed to newly formed hydrogen it may form stibine ( SbH3 ) .	wikitext
The 8 hour time weighted average ( TWA ) is set at 0 @.@ 5 mg / m3 by the American Conference of Governmental Industrial Hygienists and by the Occupational Safety and Health Administration ( OSHA ) as a legal permissible exposure limit ( PEL ) in the workplace . The National Institute for Occupational Safety and Health ( NIOSH ) has set a recommended exposure limit ( REL ) of 0 @.@ 5 mg / m3 as an 8 hour TWA . Antimony compounds are used as catalysts for polyethylene terephthalate ( PET ) production . Some studies report minor antimony leaching from PET bottles into liquids , but levels are below drinking water guidelines . Antimony concentrations in fruit juice concentrates were somewhat higher ( up to 44 @.@ 7 µg / L of antimony ) , but juices do not fall under the drinking water regulations . The drinking water guidelines are :	wikitext
World Health Organization : 20 µg / L	wikitext
Japan : 15 µg / L	wikitext
United States Environmental Protection Agency , Health Canada and the Ontario Ministry of Environment : 6 µg / L	wikitext
EU and German Federal Ministry of Environment : 5 µg / L	wikitext
The TDI proposed by WHO is 6 µg antimony per kilogram of body weight . The IDLH ( immediately dangerous to life and health ) value for antimony is 50 mg / m3 .	wikitext
= Mortimer Wheeler =	wikitext
Sir Robert Eric Mortimer Wheeler CH , CIE , MC , TD , FSA , FRS , FBA ( 10 September 1890 – 22 July 1976 ) was a British archaeologist and officer in the British Army . Over the course of his career , he served as Director of both the National Museum of Wales and London Museum , Director @-@ General of the Archaeological Survey of India , and the founder and Honorary Director of the Institute of Archaeology in London , further writing twenty @-@ four books on archaeological subjects .	wikitext
Born in Glasgow to a middle @-@ class family , Wheeler was raised largely in Yorkshire before relocating to London in his teenage years . After studying Classics at University College London ( UCL ) , he began working professionally in archaeology , specializing in the Romano @-@ British period . During World War I he volunteered for service in the Royal Artillery , being stationed on the Western Front , where he rose to the rank of major and was awarded the Military Cross . Returning to Britain , he obtained his doctorate from UCL before taking on a position at the National Museum of Wales , first as Keeper of Archaeology and then as Director , during which time he oversaw excavation at the Roman forts of Segontium , Y Gaer , and Isca Augusta with the aid of his first wife , Tessa Wheeler . Influenced by the archaeologist Augustus Pitt Rivers , Wheeler argued that excavation and the recording of stratigraphic context required an increasingly scientific and methodical approach , devel	wikitext
In 1934 , he established the Institute of Archaeology as part of the federal University of London , adopting the position of Honorary Director . In this period , he oversaw excavations of the Roman sites at Lydney Park and Verulamium and the Iron Age hill fort of Maidan Castle . During World War II , he re @-@ joined the Armed Forces and rose to the rank of brigadier , serving in the North African Campaign and then the Allied invasion of Italy . In 1944 he was appointed Director @-@ General of the Archaeological Survey of India , through which he oversaw excavations of sites at Harappa , Arikamedu , and Brahmagiri , and implemented reforms to the subcontinent 's archaeological establishment . Returning to Britain in 1948 , he divided his time between lecturing for the Institute of Archaeology and acting as archaeological adviser to Pakistan 's government . In later life , his popular books , cruise ship lectures , and appearances on radio and television , particularly the BBC series A	wikitext
Wheeler is recognised as one of the most important British archaeologists of the twentieth century , responsible for successfully encouraging British public interest in the discipline and advancing methodologies of excavation and recording . Further , he is widely acclaimed as a major figure in the establishment of South Asian archaeology . However , many of his specific interpretations of archaeological sites have been discredited or reinterpreted , and he was often criticised for bullying colleagues and sexually harassing young women .	wikitext
= = Early life = =	wikitext
= = = Childhood : 1890 – 1907 = = =	wikitext
Mortimer Wheeler was born on 10 September 1890 in the city of Glasgow , Scotland . He was the first child of the journalist Robert Mortimer Wheeler and his second wife Emily Wheeler ( née Baynes ) . The son of a tea merchant based in Bristol , in youth Robert had considered becoming a Baptist minister , but instead became a staunch freethinker while studying at the University of Edinburgh . Initially working as a lecturer in English literature , Robert turned to journalism after his first wife died in childbirth . His second wife , Emily , shared her husband 's interest in English literature , and was the niece of Thomas Spencer Baynes , a Shakespearean scholar at St. Andrews University . Their marriage was emotionally strained , a situation exacerbated by their financial insecurity . Within two years of their son 's birth , the family moved to Edinburgh , where a daughter named Amy was born . The couple gave their two children nicknames , with Mortimer being " <unk> " and Amy being "	wikitext
When Wheeler was four , his father was appointed chief leader writer for the Bradford Observer . The family relocated to Saltaire , a village northwest of Bradford , a cosmopolitan city in Yorkshire , northeast England , which was then in the midst of the wool trade boom . Wheeler was inspired by the moors surrounding Saltaire and fascinated by the area 's archaeology . He later wrote about discovering a late prehistoric cup @-@ marked stone , searching for lithics on Ilkley Moor , and digging into a barrow on <unk> Moor . Although suffering from ill health , Emily Wheeler taught her two children with the help of a maid up to the age of seven or eight . Mortimer remained emotionally distant from his mother , instead being far closer to his father , whose company he favoured over that of other children . His father had a keen interest in natural history and a love of fishing and shooting , rural pursuits in which he encouraged Mortimer to take part . Robert acquired many books for his	wikitext
In 1899 , Wheeler joined Bradford Grammar School shortly before his ninth birthday , where he proceeded straight to the second form . In 1902 Robert and Emily had a second daughter , whom they named Betty ; Mortimer showed little interest in this younger sister . In 1905 , Robert agreed to take over as head of the London office of his newspaper , by then renamed the Yorkshire Daily Observer , and so the family relocated to the southeast of the city in December , settling into a house named Carlton Lodge on South Croydon Road , West Dulwich . In 1908 they moved to 14 <unk> Avenue in nearby Herne Hill . Rather than being sent for a conventional education , when he was 15 Wheeler was instructed to educate himself by spending time in London , where he frequented The National Gallery and the Victoria and Albert Museum .	wikitext
= = = University and early career : 1907 – 14 = = =	wikitext
After passing the entrance exam on his second attempt , in 1907 Wheeler was awarded a scholarship to read classical studies at University College London ( UCL ) , commuting daily from his parental home to the university campus in Bloomsbury , central London . At UCL , he was taught by the prominent classicist A. E. Housman . During his undergraduate studies , he became editor of the Union Magazine , for which he produced a number of illustrated cartoons . Increasingly interested in art , he decided to switch from classical studies to a course at UCL 's art school , the Slade School of Fine Art ; he returned to his previous subject after coming to the opinion that – in his words – he never became more than " a conventionally accomplished picture maker " . This interlude had adversely affected his classical studies , and he received a second class BA on graduating .	wikitext
Wheeler began studying for a Master of Arts degree in classical studies , which he attained in 1912 . During this period , he also gained employment as the personal secretary of the UCL Provost Gregory Foster , although he later criticised Foster for transforming the university from " a college in the truly academic sense [ into ] a hypertrophied monstrosity as little like a college as a plesiosaurus is like a man " . It was also at this time of life that he met and began a relationship with Tessa Verney , a student then studying history at UCL , when they were both serving on the committee of the University College Literary Society .	wikitext
During his studies , Wheeler had developed his love of archaeology , having joined an excavation of Viroconium Cornoviorum , a Romano @-@ British settlement in Wroxeter , in 1913 . Considering a profession in the discipline , he won a studentship that had been established jointly by the University of London and the Society of Antiquaries in memory of Augustus Wollaston Franks . The prominent archaeologist Sir Arthur Evans doubled the amount of money that went with the studentship . Wheeler 's proposed project had been to analyse Romano @-@ Rhenish pottery , and with the grant he funded a trip to the Rhineland in Germany , there studying the Roman pottery housed in local museums ; his research into this subject was never published .	wikitext
At this period , there were very few jobs available within British archaeology ; as the later archaeologist Stuart Piggott related , " the young Wheeler was looking for a professional job where the profession had yet to be created . " In 1913 Wheeler secured a position as junior investigator for the English Royal Commission on Historical Monuments , who were embarking on a project to assess the state of all structures in the nation that pre @-@ dated 1714 . As part of this , he was first sent to Stebbing in Essex to assess Late Medieval buildings , although once that was accomplished he focused on studying the Romano @-@ British remains of that county . In summer 1914 he married Tessa in a low @-@ key , secular wedding ceremony , before they moved into Wheeler 's parental home in Herne Hill .	wikitext
= = = First World War : 1914 – 18 = = =	wikitext
After the United Kingdom 's entry into World War I in 1914 , Wheeler volunteered for the armed forces . Although preferring solitary to group activities , Wheeler found that he greatly enjoyed soldiering . For the next seven months , he was posted as an instructor in the University of London Officer Training Corps . It was during this period , in January 1915 , that a son was born to the Wheelers , and named Michael . Michael was their only child , something that was a social anomaly at the time , although it is unknown if this was by choice or not . In May 1915 , Wheeler transferred to the Royal Field Artillery ( Territorial Force ) and shortly thereafter was appointed captain . In this position he was stationed at various bases across Britain , often bringing his wife and child with him ; his responsibility was as a battery commander , initially of field guns and later of howitzers .	wikitext
In October 1917 Wheeler was posted to the 76th Army Field Artillery Brigade , one of the Royal Field Artillery brigades under the direct control of the General Officer Commanding , Third Army . The brigade was then stationed in Belgium , where it had been engaged in the Battle of Passchendaele against German troops along the Western Front . There , he was immediately placed in command of an artillery battery , replacing a major who had been poisoned by mustard gas . Being promoted to the rank of acting major , he was part of the Left Group of artillery covering the advancing Allied infantry in the battle . Throughout , he maintained correspondences with his wife , his sister Amy , and his parents . After the Allied victory in the battle , the brigade was transferred to Italy .	wikitext
Wheeler and the brigade arrived in Italy on 20 November , and proceeded through the Italian Riviera to reach Caporetto , where it had been sent to bolster the Italian troops against a German and Austro @-@ Hungarian advance . As the Russian Republic removed itself from the war , the German Army refocused its efforts on the Western Front , and so in March 1918 Wheeler 's brigade was ordered to leave Italy , getting a train from Castelfranco to Vieux Rouen in France . Back on the Western Front , the brigade was assigned to the 2nd Division , again part of Julian Byng 's Third Army , reaching a stable area of the front in April . Here , Wheeler was engaged in artillery fire for several months , before the British went on the offensive in August . On 24 August , in between the ruined villages of Achiet and <unk> , he led an expedition which captured two German field guns while under heavy fire from a castle mound ; he was later awarded the Military Cross for this action . Wheeler continue	wikitext
= = Career = =	wikitext
= = = National Museum of Wales : 1919 – 26 = = =	wikitext
On returning to London , Wheeler moved into a top @-@ floor flat near Gordon Square with his wife and child . He returned to working for the Royal Commission , examining and cataloguing the historic structures of Essex . In doing so , he produced his first publication , an academic paper on Colchester 's Roman <unk> Gate which was published in the Transactions of the Essex Archaeological Society in 1920 . He soon followed this with two papers in the Journal of Roman Studies ; the first offered a wider analysis of Roman Colchester , while the latter outlined his discovery of the vaulting for the city 's Temple of Claudius which was destroyed by Boudica 's revolt . In doing so , he developed a reputation as a Roman archaeologist in Britain . He then submitted his research on Romano @-@ Rhenish pots to the University of London , on the basis of which he was awarded his Doctorate of Letters ; thenceforth until his knighthood he styled himself as Dr Wheeler . He was unsatisfied with his jo	wikitext
He obtained a post as the Keeper of Archaeology at the National Museum of Wales , a job that also entailed becoming a lecturer in archaeology at the University College of South Wales and Monmouthshire . Taking up this position , he moved to Cardiff with his family in August 1920 , although he initially disliked the city . The museum was in disarray ; prior to the war , construction had begun on a new purpose @-@ built building to house the collections . This had ceased during the conflict and the edifice was left abandoned during Cardiff 's post @-@ war economic slump . Wheeler recognised that Wales was very divided regionally , with many Welsh people having little loyalty to Cardiff ; thus , he made a point of touring the country , lecturing to local societies about archaeology . According to the later archaeologist Lydia C. Carr , the Wheelers ' work for the cause of the museum was part of a wider " cultural @-@ nationalist movement " linked to growing Welsh nationalism during this	wikitext
Wheeler was impatient to start excavations , and in July 1921 started a six @-@ week project to excavate at the Roman fort of Segontium ; accompanied by his wife , he used up his holiday to oversee the project . A second season of excavation at the site followed in 1922 . Greatly influenced by the writings of the archaeologist Augustus Pitt @-@ Rivers , Wheeler emphasised the need for a strong , developed methodology when undertaking an archaeological excavation , believing in the need for strategic planning , or what he termed " controlled discovery " , with clear objectives in mind for a project . Further emphasising the importance of prompt publication of research results , he wrote full seasonal reports for Archaeologia Cambrensis before publishing a full report , Segontium and the Roman Occupation of Wales . Wheeler was keen on training new generations of archaeologists , and two of the most prominent students to excavate with him at Segontium were Victor Nash @-@ Williams and Ia	wikitext
Over the field seasons of 1924 and 1925 , Wheeler ran excavations of the Roman fort of Y Gaer near Brecon , a project aided by his wife and two archaeological students , Nowell Myres and Christopher Hawkes . During this project , he was visited by the prominent Egyptologist Sir Flinders Petrie and his wife Hilda Petrie ; Wheeler greatly admired Petrie 's emphasis on strong archaeological methodologies . Wheeler published the results of his excavation in The Roman Fort Near Brecon . He then began excavations at Isca Augusta , a Roman site in Caerleon , where he focused on revealing the Roman amphitheatre . Intent on attracting press attention to both raise public awareness of archaeology and attract new sources of funding , he contacted the press and organised a sponsorship of the excavation by the middle @-@ market newspaper the Daily Mail . In doing so , he emphasised the folkloric and legendary associations that the site had with King Arthur . In 1925 , Oxford University Press publi	wikitext
In 1924 , the Director of the National Museum of Wales , William Evans Hoyle , resigned amid ill health . Wheeler applied to take on the role of his replacement , providing supportive testimonials from Charles Reed Peers , Robert Bosanquet , and H. J. Fleure . Although he had no prior museum experience , he was successful in his application and was appointed Director . He then employed a close friend , Cyril Fox , to take on the vacated position of Keeper of Archaeology . Wheeler 's proposed reforms included extending the institution 's reach and influence throughout Wales by building affiliations with regional museums , and focusing on fundraising to finance the completion of the new museum premises . He obtained a £ 21 @,@ 367 donation from the wealthy shipowner William Reardon Smith and appointed Smith to be the museum 's treasurer , and also travelled to Whitehall , London , where he successfully urged the British Treasury to provide further funding for the museum . As a result ,	wikitext
= = = London Museum : 1926 – 33 = = =	wikitext
Upon the retirement of the Keeper of the London Museum , Harmon Oates , Wheeler was invited to fill the vacancy . He had been considering a return to London for some time and eagerly agreed , taking on the post , which was based at Lancaster House in the St James 's area , in July 1926 . In Wales , many felt that Wheeler had simply taken the directorship of the National Museum to advance his own career prospects , and that he had abandoned them when a better offer came along . Wheeler himself disagreed , believing that he had left Fox at the Museum as his obvious successor , and that the reforms he had implemented would therefore continue . The position initially provided Wheeler with an annual salary of £ 600 , which resulted in a decline in living standards for his family , who moved into a flat near to Victoria Station .	wikitext

The pentahalides SbF

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5 have trigonal bipyramidal molecular geometry in the gas phase , but in the liquid phase , SbF

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5 is polymeric , whereas SbCl

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5 is monomeric . SbF

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5 is a powerful Lewis acid used to make the <unk> <unk> acid ( " <unk> " ) .

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Oxyhalides are more common for antimony than arsenic and phosphorus . Antimony trioxide dissolves in concentrated acid to form <unk> compounds such as <unk> and ( SbO )

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= = = <unk> , hydrides , and organoantimony compounds = = =

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Compounds in this class generally are described as derivatives of Sb3 − . Antimony forms antimonides with metals , such as indium antimonide ( <unk> ) and silver antimonide ( Ag

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<unk> ) . The alkali metal and zinc antimonides , such as <unk> and <unk> , are more reactive . Treating these antimonides with acid produces the unstable gas stibine , <unk>

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Sb3 − + 3 H + → <unk>

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<unk> can also be produced by treating Sb3 + salts with hydride reagents such as sodium <unk> decomposes spontaneously at room temperature . Because stibine has a positive heat of formation , it is thermodynamically unstable and thus antimony does not react with hydrogen directly .

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<unk> compounds are typically prepared by alkylation of antimony halides with Grignard reagents . A large variety of compounds are known with both Sb ( III ) and Sb ( V ) centers , including mixed chloro @-@ organic derivatives , anions , and cations . Examples include Sb ( C6H5 ) 3 ( <unk> ) , Sb2 ( C6H5 ) 4 ( with an Sb @-@ Sb bond ) , and cyclic [ Sb ( C6H5 ) ] n . <unk> organoantimony compounds are common , examples being Sb ( C6H5 ) 5 and several related halides .

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= = History = =

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Antimony ( III ) sulfide , Sb2S3 , was recognized in predynastic Egypt as an eye cosmetic ( kohl ) as early as about 3100 BC , when the cosmetic palette was invented .

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An artifact , said to be part of a vase , made of antimony dating to about 3000 BC was found at <unk> , Chaldea ( part of present @-@ day Iraq ) , and a copper object plated with antimony dating between 2500 BC and 2200 BC has been found in Egypt . Austen , at a lecture by Herbert Gladstone in 1892 commented that " we only know of antimony at the present day as a highly brittle and crystalline metal , which could hardly be fashioned into a useful vase , and therefore this remarkable ' find ' ( artifact mentioned above ) must represent the lost art of rendering antimony malleable . "

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<unk> was unconvinced the artifact was indeed a vase , mentioning that <unk> , after his analysis of the Tello object ( published in 1975 ) , " attempted to relate the metal to Transcaucasian natural antimony " ( i.e. native metal ) and that " the antimony objects from Transcaucasia are all small personal ornaments . " This weakens the evidence for a lost art " of rendering antimony malleable . "

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The Roman scholar Pliny the Elder described several ways of preparing antimony sulfide for medical purposes in his treatise Natural History . Pliny the Elder also made a distinction between " male " and " female " forms of antimony ; the male form is probably the sulfide , while the female form , which is superior , heavier , and less friable , has been suspected to be native metallic antimony .

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The Roman naturalist Pedanius Dioscorides mentioned that antimony sulfide could be roasted by heating by a current of air . It is thought that this produced metallic antimony .

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The first description of a procedure for isolating antimony is in the book De la <unk> of 1540 by Vannoccio Biringuccio ; this predates the more famous 1556 book by Agricola , De re metallica . In this context Agricola has been often incorrectly credited with the discovery of metallic antimony . The book <unk> <unk> <unk> ( The Triumphal Chariot of Antimony ) , describing the preparation of metallic antimony , was published in Germany in 1604 . It was purported to have been written by a Benedictine monk , writing under the name Basilius Valentinus , in the 15th century ; if it were authentic , which it is not , it would predate Biringuccio .

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The metal antimony was known to German chemist Andreas Libavius in 1615 who obtained it by adding iron to a molten mixture of antimony sulfide , salt and potassium tartrate . This procedure produced antimony with a crystalline or starred surface .

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With the advent of challenges to phlogiston theory it was recognized that antimony is an element forming sulfides , oxides , and other compounds , as is the case with other metals .

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The first natural occurrence of pure antimony in the Earth 's crust was described by the Swedish scientist and local mine district engineer Anton von <unk> in 1783 ; the type @-@ sample was collected from the Sala Silver Mine in the <unk> mining district of Sala , <unk> , Sweden .

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= = = Etymology = = =

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The ancient words for antimony mostly have , as their chief meaning , kohl , the sulfide of antimony .

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The Egyptians called antimony <unk> ; in hieroglyphs , the vowels are uncertain , but there is an Arabic tradition that the word is <unk> <unk> . The Greek word , <unk> stimmi , is probably a loan word from Arabic or from Egyptian <unk>

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and is used by Attic tragic poets of the 5th century BC ; later Greeks also used <unk> <unk> , as did Celsus and Pliny , writing in Latin , in the first century AD . Pliny also gives the names <unk> [ sic ] , <unk> , alabaster , and the " very common " <unk> , " wide @-@ eye " ( from the effect of the cosmetic ) . Later Latin authors adapted the word to Latin as stibium . The Arabic word for the substance , as opposed to the cosmetic , can appear as <unk> <unk> , <unk> , <unk> , or <unk> . <unk> suggests the first form , which is the earliest , derives from <unk> , an accusative for stimmi .

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The use of Sb as the standard chemical symbol for antimony is due to Jöns Jakob Berzelius , who used this abbreviation of the name stibium . The medieval Latin form , from which the modern languages and late Byzantine Greek take their names for antimony , is antimonium . The origin of this is uncertain ; all suggestions have some difficulty either of form or interpretation . The popular etymology , from <unk> anti @-@ <unk> or French <unk> , still has adherents ; this would mean " monk @-@ killer " , and is explained by many early alchemists being monks , and antimony being poisonous .

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Another popular etymology is the hypothetical Greek word <unk> <unk> , " against aloneness " , explained as " not found as metal " , or " not found unalloyed " . Lippmann conjectured a hypothetical Greek word <unk> <unk> , which would mean " <unk> " , and cites several examples of related Greek words ( but not that one ) which describe chemical or biological efflorescence .

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The early uses of antimonium include the translations , in 1050 – 1100 , by Constantine the African of Arabic medical treatises . Several authorities believe antimonium is a scribal corruption of some Arabic form ; <unk> derives it from <unk> ; other possibilities include <unk> , the Arabic name of the metalloid , and a hypothetical as @-@ stimmi , derived from or parallel to the Greek .

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= = Production = =

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= = = Top producers and production volumes = = =

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The British Geological Survey ( BGS ) reported that in 2005 , China was the top producer of antimony with an approximately 84 % world share , followed at a distance by South Africa , Bolivia and Tajikistan . <unk> Mine in Hunan province has the largest deposits in China with an estimated deposit of 2 @.@ 1 million metric tons .

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In 2010 , according to the US Geological Survey , China accounted for 88 @.@ 9 % of total antimony production with South Africa , Bolivia and Russia sharing the second place .

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However , Roskill Consulting estimates for primary production show that in 2010 China held a 76 @.@ 75 % share of world supply with 120 @,@ 462 tonnes ( 90 @,@ 000 tonnes of reported and 30 @,@ 464 tonnes of un @-@ reported production ) , followed by Russia ( 4 @.@ 14 % share , 6 @,@ 500 tonnes of production ) , Myanmar ( 3 @.@ 76 % share , 5 @,@ 897 tonnes ) , Canada ( 3 @.@ 61 % share , 5 @,@ 660 tonnes ) , Tajikistan ( 3 @.@ 42 % share , 5 @,@ 370 tonnes ) and Bolivia ( 3 @.@ 17 % share , 4 @,@ 980 tonnes ) .

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Roskill estimates that secondary production globally in 2010 was 39 @,@ 540 tonnes .

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Antimony was ranked first in a Risk List published by the British Geological Survey in the second half of 2011 . The list provides an indication of the relative risk to the supply of chemical elements or element groups required to maintain the current British economy and lifestyle .

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Also , antimony was identified as one of 12 critical raw materials for the EU in a report published in 2011 , primarily due to the lack of supply outside China .

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Reported production of antimony in China fell in 2010 and is unlikely to increase in the coming years , according to the Roskill report . No significant antimony deposits in China have been developed for about ten years , and the remaining economic reserves are being rapidly depleted .

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The world 's largest antimony producers , according to Roskill , are listed below :

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= = = Reserves = = =

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According to statistics from the USGS , current global reserves of antimony will be depleted in 13 years . However , the USGS expects more resources will be found .

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= = = Production process = = =

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The extraction of antimony from ores depends on the quality of the ore and composition of the ore . Most antimony is mined as the sulfide ; lower @-@ grade ores are concentrated by froth flotation , while higher @-@ grade ores are heated to 500 – 600 ° C , the temperature at which stibnite melts and is separated from the gangue minerals . Antimony can be isolated from the crude antimony sulfide by a reduction with scrap iron :

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3 + 3 Fe → 2 Sb + 3 FeS

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The sulfide is converted to an oxide and advantage is often taken of the volatility of antimony ( III ) oxide , which is recovered from roasting . This material is often used directly for the main applications , impurities being arsenic and sulfide . Isolating antimony from its oxide is performed by a carbothermal reduction :

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3 + 3 C → 4 Sb + 3 CO

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The lower @-@ grade ores are reduced in blast furnaces while the higher @-@ grade ores are reduced in reverberatory furnaces .

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= = Applications = =

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About 60 % of antimony is consumed in flame retardants , and 20 % is used in alloys for batteries , plain bearings and solders .

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= = = Flame retardants = = =

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Antimony is mainly used as its trioxide in making flame @-@ proofing compounds . It is nearly always used in combination with halogenated flame retardants , with the only exception being in halogen @-@ containing polymers . The formation of halogenated antimony compounds is the cause for the flame retarding effect of antimony trioxide , due to reaction of these compounds with hydrogen atoms and probably also with oxygen atoms and OH radicals , thus inhibiting fire . Markets for these flame @-@ retardant applications include children 's clothing , toys , aircraft and automobile seat covers . It is also used in the fiberglass composites industry as an additive to polyester resins for such items as light aircraft engine covers . The resin will burn while a flame is held to it but will extinguish itself as soon as the flame is removed .

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= = = Alloys = = =

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Antimony forms a highly useful alloy with lead , increasing its hardness and mechanical strength . For most applications involving lead , varying amounts of antimony are used as alloying metal . In lead – acid batteries , this addition improves the charging characteristics and reduces generation of unwanted hydrogen during charging . It is used in <unk> alloys ( such as Babbitt metal ) , in bullets and lead shot , cable sheathing , type metal ( for example , for linotype printing machines ) , solder ( some " lead @-@ free " solders contain 5 % Sb ) , in pewter , and in hardening alloys with low tin content in the manufacturing of organ pipes .

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= = = Other applications = = =

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Three other applications make up nearly all the rest of the consumption . One of these uses is as a stabilizer and a catalyst for the production of <unk> . Another application is to serve as a fining agent to remove microscopic bubbles in glass , mostly for TV screens ; this is achieved by the interaction of antimony ions with oxygen , interfering the latter from forming bubbles . The third major application is the use as pigment .

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Antimony is being increasingly used in the semiconductor industry as a dopant for heavily doped n @-@ type silicon wafers in the production of diodes , infrared detectors , and Hall @-@ effect devices . In the 1950s , tiny beads of a lead @-@ antimony alloy were used to dope the emitters and collectors of n @-@ p @-@ n alloy junction transistors with antimony . <unk> antimonide is used as a material for mid @-@ infrared detectors .

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Few biological or medical applications exist for antimony . Treatments principally containing antimony are known as <unk> and are used as <unk> . Antimony compounds are used as <unk> drugs . Potassium <unk> tartrate , or tartar emetic , was once used as an anti @-@ <unk> drug from 1919 on . It was subsequently replaced by <unk> . Antimony and its compounds are used in several veterinary preparations like <unk> or lithium antimony <unk> , which is used as a skin conditioner in ruminants . Antimony has a nourishing or conditioning effect on keratinized tissues , at least in animals .

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Antimony @-@ based drugs , such as <unk> <unk> , are also considered the drugs of choice for treatment of leishmaniasis in domestic animals . Unfortunately , as well as having low therapeutic indices , the drugs are poor at penetrating the bone marrow , where some of the Leishmania amastigotes reside , and so cure of the disease – especially the visceral form – is very difficult . Elemental antimony as an antimony pill was once used as a medicine . It could be reused by others after ingestion and elimination .

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In the heads of some safety matches , antimony ( III ) sulfide is used . Antimony @-@ 124 is used together with beryllium in neutron sources ; the gamma rays emitted by antimony @-@ 124 initiate the photodisintegration of beryllium . The emitted neutrons have an average energy of 24 keV . Antimony sulfides have been shown to help stabilize the friction coefficient in automotive brake pad materials .

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Antimony also is used in the making of bullets and bullet tracers . This element is also used in paint and glass art crafts and as opacifier in enamel .

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= = Precautions = =

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The effects of antimony and its compounds on human and environmental health differ widely . The massive antimony metal does not affect human and environmental health . Inhalation of antimony trioxide ( and similar poorly soluble Sb ( III ) dust particles such as antimony dust ) is considered harmful and suspected of causing cancer . However , these effects are only observed with female rats and after long @-@ term exposure to high dust concentrations . The effects are hypothesized to be attributed to inhalation of poorly soluble Sb particles leading to impaired lung clearance , lung overload , inflammation and ultimately tumour formation , not to exposure to antimony ions ( OECD , 2008 ) . Antimony chlorides are corrosive to skin . The effects of antimony are not comparable to arsenic ; this might be caused by the significant differences of uptake , metabolism and excretion between arsenic and antimony .

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For oral absorption , <unk> ( 1994 ) recommended values of 10 % for tartar emetic and 1 % for all other antimony compounds . Dermal absorption for metals is estimated at most 1 % ( <unk> , 2007 ) . Inhalation absorption of antimony trioxide and other poorly soluble Sb ( III ) substances ( such as antimony dust ) is estimated at 6 @.@ 8 % ( OECD , 2008 ) , whereas a value < 1 % is derived for Sb ( V ) substances . Antimony ( V ) is not quantitatively reduced to antimony ( III ) in the cell , and both species exist simultaneously .

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Antimony is mainly excreted from the human body via urine . Antimony and its compounds do not cause acute human health effects , with the exception of antimony potassium tartrate ( " tartar emetic " ) , a prodrug that is intentionally used to treat leishmaniasis patients .

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Prolonged skin contact with antimony dust may cause dermatitis . However , it was agreed at the European Union level that the skin rashes observed are not substance @-@ specific , but most probably due to a physical blocking of sweat ducts ( ECHA / PR / 09 / 09 , Helsinki , 6 July 2009 ) . Antimony dust may also be explosive when dispersed in the air ; when in a bulk solid it is not combustible .

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Antimony is incompatible with strong acids , halogenated acids , and oxidizers ; when exposed to newly formed hydrogen it may form stibine ( SbH3 ) .

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The 8 hour time weighted average ( TWA ) is set at 0 @.@ 5 mg / m3 by the American Conference of Governmental Industrial Hygienists and by the Occupational Safety and Health Administration ( OSHA ) as a legal permissible exposure limit ( PEL ) in the workplace . The National Institute for Occupational Safety and Health ( NIOSH ) has set a recommended exposure limit ( REL ) of 0 @.@ 5 mg / m3 as an 8 hour TWA . Antimony compounds are used as catalysts for polyethylene terephthalate ( PET ) production . Some studies report minor antimony leaching from PET bottles into liquids , but levels are below drinking water guidelines . Antimony concentrations in fruit juice concentrates were somewhat higher ( up to 44 @.@ 7 µg / L of antimony ) , but juices do not fall under the drinking water regulations . The drinking water guidelines are :

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World Health Organization : 20 µg / L

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Japan : 15 µg / L

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United States Environmental Protection Agency , Health Canada and the Ontario Ministry of Environment : 6 µg / L

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EU and German Federal Ministry of Environment : 5 µg / L

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The TDI proposed by WHO is 6 µg antimony per kilogram of body weight . The IDLH ( immediately dangerous to life and health ) value for antimony is 50 mg / m3 .

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= Mortimer Wheeler =

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Sir Robert Eric Mortimer Wheeler CH , CIE , MC , TD , FSA , FRS , FBA ( 10 September 1890 – 22 July 1976 ) was a British archaeologist and officer in the British Army . Over the course of his career , he served as Director of both the National Museum of Wales and London Museum , Director @-@ General of the Archaeological Survey of India , and the founder and Honorary Director of the Institute of Archaeology in London , further writing twenty @-@ four books on archaeological subjects .

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Born in Glasgow to a middle @-@ class family , Wheeler was raised largely in Yorkshire before relocating to London in his teenage years . After studying Classics at University College London ( UCL ) , he began working professionally in archaeology , specializing in the Romano @-@ British period . During World War I he volunteered for service in the Royal Artillery , being stationed on the Western Front , where he rose to the rank of major and was awarded the Military Cross . Returning to Britain , he obtained his doctorate from UCL before taking on a position at the National Museum of Wales , first as Keeper of Archaeology and then as Director , during which time he oversaw excavation at the Roman forts of Segontium , Y Gaer , and Isca Augusta with the aid of his first wife , Tessa Wheeler . Influenced by the archaeologist Augustus Pitt Rivers , Wheeler argued that excavation and the recording of stratigraphic context required an increasingly scientific and methodical approach , devel

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In 1934 , he established the Institute of Archaeology as part of the federal University of London , adopting the position of Honorary Director . In this period , he oversaw excavations of the Roman sites at Lydney Park and Verulamium and the Iron Age hill fort of Maidan Castle . During World War II , he re @-@ joined the Armed Forces and rose to the rank of brigadier , serving in the North African Campaign and then the Allied invasion of Italy . In 1944 he was appointed Director @-@ General of the Archaeological Survey of India , through which he oversaw excavations of sites at Harappa , Arikamedu , and Brahmagiri , and implemented reforms to the subcontinent 's archaeological establishment . Returning to Britain in 1948 , he divided his time between lecturing for the Institute of Archaeology and acting as archaeological adviser to Pakistan 's government . In later life , his popular books , cruise ship lectures , and appearances on radio and television , particularly the BBC series A

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Wheeler is recognised as one of the most important British archaeologists of the twentieth century , responsible for successfully encouraging British public interest in the discipline and advancing methodologies of excavation and recording . Further , he is widely acclaimed as a major figure in the establishment of South Asian archaeology . However , many of his specific interpretations of archaeological sites have been discredited or reinterpreted , and he was often criticised for bullying colleagues and sexually harassing young women .

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= = Early life = =

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= = = Childhood : 1890 – 1907 = = =

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Mortimer Wheeler was born on 10 September 1890 in the city of Glasgow , Scotland . He was the first child of the journalist Robert Mortimer Wheeler and his second wife Emily Wheeler ( née Baynes ) . The son of a tea merchant based in Bristol , in youth Robert had considered becoming a Baptist minister , but instead became a staunch freethinker while studying at the University of Edinburgh . Initially working as a lecturer in English literature , Robert turned to journalism after his first wife died in childbirth . His second wife , Emily , shared her husband 's interest in English literature , and was the niece of Thomas Spencer Baynes , a Shakespearean scholar at St. Andrews University . Their marriage was emotionally strained , a situation exacerbated by their financial insecurity . Within two years of their son 's birth , the family moved to Edinburgh , where a daughter named Amy was born . The couple gave their two children nicknames , with Mortimer being " <unk> " and Amy being "

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When Wheeler was four , his father was appointed chief leader writer for the Bradford Observer . The family relocated to Saltaire , a village northwest of Bradford , a cosmopolitan city in Yorkshire , northeast England , which was then in the midst of the wool trade boom . Wheeler was inspired by the moors surrounding Saltaire and fascinated by the area 's archaeology . He later wrote about discovering a late prehistoric cup @-@ marked stone , searching for lithics on Ilkley Moor , and digging into a barrow on <unk> Moor . Although suffering from ill health , Emily Wheeler taught her two children with the help of a maid up to the age of seven or eight . Mortimer remained emotionally distant from his mother , instead being far closer to his father , whose company he favoured over that of other children . His father had a keen interest in natural history and a love of fishing and shooting , rural pursuits in which he encouraged Mortimer to take part . Robert acquired many books for his

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In 1899 , Wheeler joined Bradford Grammar School shortly before his ninth birthday , where he proceeded straight to the second form . In 1902 Robert and Emily had a second daughter , whom they named Betty ; Mortimer showed little interest in this younger sister . In 1905 , Robert agreed to take over as head of the London office of his newspaper , by then renamed the Yorkshire Daily Observer , and so the family relocated to the southeast of the city in December , settling into a house named Carlton Lodge on South Croydon Road , West Dulwich . In 1908 they moved to 14 <unk> Avenue in nearby Herne Hill . Rather than being sent for a conventional education , when he was 15 Wheeler was instructed to educate himself by spending time in London , where he frequented The National Gallery and the Victoria and Albert Museum .

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= = = University and early career : 1907 – 14 = = =

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After passing the entrance exam on his second attempt , in 1907 Wheeler was awarded a scholarship to read classical studies at University College London ( UCL ) , commuting daily from his parental home to the university campus in Bloomsbury , central London . At UCL , he was taught by the prominent classicist A. E. Housman . During his undergraduate studies , he became editor of the Union Magazine , for which he produced a number of illustrated cartoons . Increasingly interested in art , he decided to switch from classical studies to a course at UCL 's art school , the Slade School of Fine Art ; he returned to his previous subject after coming to the opinion that – in his words – he never became more than " a conventionally accomplished picture maker " . This interlude had adversely affected his classical studies , and he received a second class BA on graduating .

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Wheeler began studying for a Master of Arts degree in classical studies , which he attained in 1912 . During this period , he also gained employment as the personal secretary of the UCL Provost Gregory Foster , although he later criticised Foster for transforming the university from " a college in the truly academic sense [ into ] a hypertrophied monstrosity as little like a college as a plesiosaurus is like a man " . It was also at this time of life that he met and began a relationship with Tessa Verney , a student then studying history at UCL , when they were both serving on the committee of the University College Literary Society .

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During his studies , Wheeler had developed his love of archaeology , having joined an excavation of Viroconium Cornoviorum , a Romano @-@ British settlement in Wroxeter , in 1913 . Considering a profession in the discipline , he won a studentship that had been established jointly by the University of London and the Society of Antiquaries in memory of Augustus Wollaston Franks . The prominent archaeologist Sir Arthur Evans doubled the amount of money that went with the studentship . Wheeler 's proposed project had been to analyse Romano @-@ Rhenish pottery , and with the grant he funded a trip to the Rhineland in Germany , there studying the Roman pottery housed in local museums ; his research into this subject was never published .

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At this period , there were very few jobs available within British archaeology ; as the later archaeologist Stuart Piggott related , " the young Wheeler was looking for a professional job where the profession had yet to be created . " In 1913 Wheeler secured a position as junior investigator for the English Royal Commission on Historical Monuments , who were embarking on a project to assess the state of all structures in the nation that pre @-@ dated 1714 . As part of this , he was first sent to Stebbing in Essex to assess Late Medieval buildings , although once that was accomplished he focused on studying the Romano @-@ British remains of that county . In summer 1914 he married Tessa in a low @-@ key , secular wedding ceremony , before they moved into Wheeler 's parental home in Herne Hill .

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= = = First World War : 1914 – 18 = = =

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After the United Kingdom 's entry into World War I in 1914 , Wheeler volunteered for the armed forces . Although preferring solitary to group activities , Wheeler found that he greatly enjoyed soldiering . For the next seven months , he was posted as an instructor in the University of London Officer Training Corps . It was during this period , in January 1915 , that a son was born to the Wheelers , and named Michael . Michael was their only child , something that was a social anomaly at the time , although it is unknown if this was by choice or not . In May 1915 , Wheeler transferred to the Royal Field Artillery ( Territorial Force ) and shortly thereafter was appointed captain . In this position he was stationed at various bases across Britain , often bringing his wife and child with him ; his responsibility was as a battery commander , initially of field guns and later of howitzers .

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In October 1917 Wheeler was posted to the 76th Army Field Artillery Brigade , one of the Royal Field Artillery brigades under the direct control of the General Officer Commanding , Third Army . The brigade was then stationed in Belgium , where it had been engaged in the Battle of Passchendaele against German troops along the Western Front . There , he was immediately placed in command of an artillery battery , replacing a major who had been poisoned by mustard gas . Being promoted to the rank of acting major , he was part of the Left Group of artillery covering the advancing Allied infantry in the battle . Throughout , he maintained correspondences with his wife , his sister Amy , and his parents . After the Allied victory in the battle , the brigade was transferred to Italy .

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Wheeler and the brigade arrived in Italy on 20 November , and proceeded through the Italian Riviera to reach Caporetto , where it had been sent to bolster the Italian troops against a German and Austro @-@ Hungarian advance . As the Russian Republic removed itself from the war , the German Army refocused its efforts on the Western Front , and so in March 1918 Wheeler 's brigade was ordered to leave Italy , getting a train from Castelfranco to Vieux Rouen in France . Back on the Western Front , the brigade was assigned to the 2nd Division , again part of Julian Byng 's Third Army , reaching a stable area of the front in April . Here , Wheeler was engaged in artillery fire for several months , before the British went on the offensive in August . On 24 August , in between the ruined villages of Achiet and <unk> , he led an expedition which captured two German field guns while under heavy fire from a castle mound ; he was later awarded the Military Cross for this action . Wheeler continue

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= = Career = =

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= = = National Museum of Wales : 1919 – 26 = = =

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On returning to London , Wheeler moved into a top @-@ floor flat near Gordon Square with his wife and child . He returned to working for the Royal Commission , examining and cataloguing the historic structures of Essex . In doing so , he produced his first publication , an academic paper on Colchester 's Roman <unk> Gate which was published in the Transactions of the Essex Archaeological Society in 1920 . He soon followed this with two papers in the Journal of Roman Studies ; the first offered a wider analysis of Roman Colchester , while the latter outlined his discovery of the vaulting for the city 's Temple of Claudius which was destroyed by Boudica 's revolt . In doing so , he developed a reputation as a Roman archaeologist in Britain . He then submitted his research on Romano @-@ Rhenish pots to the University of London , on the basis of which he was awarded his Doctorate of Letters ; thenceforth until his knighthood he styled himself as Dr Wheeler . He was unsatisfied with his jo

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He obtained a post as the Keeper of Archaeology at the National Museum of Wales , a job that also entailed becoming a lecturer in archaeology at the University College of South Wales and Monmouthshire . Taking up this position , he moved to Cardiff with his family in August 1920 , although he initially disliked the city . The museum was in disarray ; prior to the war , construction had begun on a new purpose @-@ built building to house the collections . This had ceased during the conflict and the edifice was left abandoned during Cardiff 's post @-@ war economic slump . Wheeler recognised that Wales was very divided regionally , with many Welsh people having little loyalty to Cardiff ; thus , he made a point of touring the country , lecturing to local societies about archaeology . According to the later archaeologist Lydia C. Carr , the Wheelers ' work for the cause of the museum was part of a wider " cultural @-@ nationalist movement " linked to growing Welsh nationalism during this

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Wheeler was impatient to start excavations , and in July 1921 started a six @-@ week project to excavate at the Roman fort of Segontium ; accompanied by his wife , he used up his holiday to oversee the project . A second season of excavation at the site followed in 1922 . Greatly influenced by the writings of the archaeologist Augustus Pitt @-@ Rivers , Wheeler emphasised the need for a strong , developed methodology when undertaking an archaeological excavation , believing in the need for strategic planning , or what he termed " controlled discovery " , with clear objectives in mind for a project . Further emphasising the importance of prompt publication of research results , he wrote full seasonal reports for Archaeologia Cambrensis before publishing a full report , Segontium and the Roman Occupation of Wales . Wheeler was keen on training new generations of archaeologists , and two of the most prominent students to excavate with him at Segontium were Victor Nash @-@ Williams and Ia

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Over the field seasons of 1924 and 1925 , Wheeler ran excavations of the Roman fort of Y Gaer near Brecon , a project aided by his wife and two archaeological students , Nowell Myres and Christopher Hawkes . During this project , he was visited by the prominent Egyptologist Sir Flinders Petrie and his wife Hilda Petrie ; Wheeler greatly admired Petrie 's emphasis on strong archaeological methodologies . Wheeler published the results of his excavation in The Roman Fort Near Brecon . He then began excavations at Isca Augusta , a Roman site in Caerleon , where he focused on revealing the Roman amphitheatre . Intent on attracting press attention to both raise public awareness of archaeology and attract new sources of funding , he contacted the press and organised a sponsorship of the excavation by the middle @-@ market newspaper the Daily Mail . In doing so , he emphasised the folkloric and legendary associations that the site had with King Arthur . In 1925 , Oxford University Press publi

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In 1924 , the Director of the National Museum of Wales , William Evans Hoyle , resigned amid ill health . Wheeler applied to take on the role of his replacement , providing supportive testimonials from Charles Reed Peers , Robert Bosanquet , and H. J. Fleure . Although he had no prior museum experience , he was successful in his application and was appointed Director . He then employed a close friend , Cyril Fox , to take on the vacated position of Keeper of Archaeology . Wheeler 's proposed reforms included extending the institution 's reach and influence throughout Wales by building affiliations with regional museums , and focusing on fundraising to finance the completion of the new museum premises . He obtained a £ 21 @,@ 367 donation from the wealthy shipowner William Reardon Smith and appointed Smith to be the museum 's treasurer , and also travelled to Whitehall , London , where he successfully urged the British Treasury to provide further funding for the museum . As a result ,

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= = = London Museum : 1926 – 33 = = =

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Upon the retirement of the Keeper of the London Museum , Harmon Oates , Wheeler was invited to fill the vacancy . He had been considering a return to London for some time and eagerly agreed , taking on the post , which was based at Lancaster House in the St James 's area , in July 1926 . In Wales , many felt that Wheeler had simply taken the directorship of the National Museum to advance his own career prospects , and that he had abandoned them when a better offer came along . Wheeler himself disagreed , believing that he had left Fox at the Museum as his obvious successor , and that the reforms he had implemented would therefore continue . The position initially provided Wheeler with an annual salary of £ 600 , which resulted in a decline in living standards for his family , who moved into a flat near to Victoria Station .

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