| # supercon_tc — data file |
| |
| ## Usage |
| |
| ```bash |
| bash download.sh # writes data.csv in this directory |
| ``` |
| |
| Requires: `python3` (stdlib only — `csv`, `zipfile`, `io`, `urllib`). |
| No third-party packages needed. The script downloads the raw ZIP from the |
| UCI ML Repository, extracts `unique_m.csv`, keeps only the 77 elements with |
| non-zero fractions in at least one row, and writes `data.csv`. Runtime: ~15 s |
| on a typical connection. |
|
|
| `data.csv` is gitignored per the repo-wide rule |
| (`benchmarks/**/data/data.*` in `.gitignore`) — always rebuild locally with |
| this script. Only this `README.md` is kept in git. |
|
|
| ## Source |
|
|
| | Field | Value | |
| |------------|-------| |
| | Dataset | SuperCon / NIMS superconductor database (via UCI ML Repository) | |
| | URL | <https://archive.ics.uci.edu/static/public/464/superconductivty+data.zip> | |
| | License | **unknown** (NIMS SuperCon database, publicly accessible, no explicit license) | |
| | Paper | Hamidieh, K., *Computational Materials Science* **154**, 346–354 (2018) | |
| | DOI | <https://doi.org/10.1016/j.commatsci.2018.07.052> | |
| | Retrieved | 2026-04-22 | |
|
|
| The critical temperature values are experimentally measured from the NIMS |
| SuperCon database of inorganic superconductors. The element mole fractions |
| come directly from the chemical formula of each material (column `unique_m.csv` |
| in the original ZIP). |
|
|
| ## Column layout |
|
|
| Column 0 is the output. Columns 1–77 are element mole fractions |
| (values are non-zero for at least one material; 9 noble-gas / unstable |
| elements dropped as all-zero: He, Ne, Ar, Kr, Xe, Pm, Po, At, Rn). |
|
|
| | Col | Name | Units | Role | |
| |-----|------------------|-------|--------| |
| | 0 | `critical_temp` | K | output | |
| | 1 | `frac_Ag` | dimensionless | input | |
| | 2 | `frac_Al` | dimensionless | input | |
| | 3 | `frac_As` | dimensionless | input | |
| | 4 | `frac_Au` | dimensionless | input | |
| | 5 | `frac_B` | dimensionless | input | |
| | 6 | `frac_Ba` | dimensionless | input | |
| | 7 | `frac_Be` | dimensionless | input | |
| | 8 | `frac_Bi` | dimensionless | input | |
| | 9 | `frac_Br` | dimensionless | input | |
| | 10 | `frac_C` | dimensionless | input | |
| | 11 | `frac_Ca` | dimensionless | input | |
| | 12 | `frac_Cd` | dimensionless | input | |
| | 13 | `frac_Ce` | dimensionless | input | |
| | 14 | `frac_Cl` | dimensionless | input | |
| | 15 | `frac_Co` | dimensionless | input | |
| | 16 | `frac_Cr` | dimensionless | input | |
| | 17 | `frac_Cs` | dimensionless | input | |
| | 18 | `frac_Cu` | dimensionless | input | |
| | 19 | `frac_Dy` | dimensionless | input | |
| | 20 | `frac_Er` | dimensionless | input | |
| | 21 | `frac_Eu` | dimensionless | input | |
| | 22 | `frac_F` | dimensionless | input | |
| | 23 | `frac_Fe` | dimensionless | input | |
| | 24 | `frac_Ga` | dimensionless | input | |
| | 25 | `frac_Gd` | dimensionless | input | |
| | 26 | `frac_Ge` | dimensionless | input | |
| | 27 | `frac_H` | dimensionless | input | |
| | 28 | `frac_Hf` | dimensionless | input | |
| | 29 | `frac_Hg` | dimensionless | input | |
| | 30 | `frac_Ho` | dimensionless | input | |
| | 31 | `frac_I` | dimensionless | input | |
| | 32 | `frac_In` | dimensionless | input | |
| | 33 | `frac_Ir` | dimensionless | input | |
| | 34 | `frac_K` | dimensionless | input | |
| | 35 | `frac_La` | dimensionless | input | |
| | 36 | `frac_Li` | dimensionless | input | |
| | 37 | `frac_Lu` | dimensionless | input | |
| | 38 | `frac_Mg` | dimensionless | input | |
| | 39 | `frac_Mn` | dimensionless | input | |
| | 40 | `frac_Mo` | dimensionless | input | |
| | 41 | `frac_N` | dimensionless | input | |
| | 42 | `frac_Na` | dimensionless | input | |
| | 43 | `frac_Nb` | dimensionless | input | |
| | 44 | `frac_Nd` | dimensionless | input | |
| | 45 | `frac_Ni` | dimensionless | input | |
| | 46 | `frac_O` | dimensionless | input | |
| | 47 | `frac_Os` | dimensionless | input | |
| | 48 | `frac_P` | dimensionless | input | |
| | 49 | `frac_Pb` | dimensionless | input | |
| | 50 | `frac_Pd` | dimensionless | input | |
| | 51 | `frac_Pr` | dimensionless | input | |
| | 52 | `frac_Pt` | dimensionless | input | |
| | 53 | `frac_Rb` | dimensionless | input | |
| | 54 | `frac_Re` | dimensionless | input | |
| | 55 | `frac_Rh` | dimensionless | input | |
| | 56 | `frac_Ru` | dimensionless | input | |
| | 57 | `frac_S` | dimensionless | input | |
| | 58 | `frac_Sb` | dimensionless | input | |
| | 59 | `frac_Sc` | dimensionless | input | |
| | 60 | `frac_Se` | dimensionless | input | |
| | 61 | `frac_Si` | dimensionless | input | |
| | 62 | `frac_Sm` | dimensionless | input | |
| | 63 | `frac_Sn` | dimensionless | input | |
| | 64 | `frac_Sr` | dimensionless | input | |
| | 65 | `frac_Ta` | dimensionless | input | |
| | 66 | `frac_Tb` | dimensionless | input | |
| | 67 | `frac_Tc` | dimensionless | input | |
| | 68 | `frac_Te` | dimensionless | input | |
| | 69 | `frac_Ti` | dimensionless | input | |
| | 70 | `frac_Tl` | dimensionless | input | |
| | 71 | `frac_Tm` | dimensionless | input | |
| | 72 | `frac_V` | dimensionless | input | |
| | 73 | `frac_W` | dimensionless | input | |
| | 74 | `frac_Y` | dimensionless | input | |
| | 75 | `frac_Yb` | dimensionless | input | |
| | 76 | `frac_Zn` | dimensionless | input | |
| | 77 | `frac_Zr` | dimensionless | input | |
|
|
| ## Dataset statistics (after download) |
|
|
| - Rows: 21,263 |
| - Columns: 78 (1 output + 77 element fraction inputs) |
| - Distinct elements: 77 (9 all-zero elements dropped: He, Ne, Ar, Kr, Xe, Pm, Po, At, Rn) |
| - Output range: [0.00021, 185.0] K (critical temperature) |
| - Output median: ~20.0 K |
| - Output mean: ~34.42 K |
| - No missing values (element fractions are 0.0 for absent elements) |
| - Tc == 0 rows: 0 (all rows have positive Tc) |
|
|
