colabfit/JARVIS_QM9_STD_JCTC

Cite this dataset

Ramakrishnan, R., Dral, P. O., Rupp, M., and Lilienfeld, O. A. JARVIS QM9 STD JCTC. ColabFit, 2023. https://doi.org/10.60732/5935fa4d

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https://materials.colabfit.org/id/DS_jz1q9juw7ycj_0

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Dataset Name

JARVIS QM9 STD JCTC

Description

The JARVIS_QM9_STD_JCTC dataset is part of the joint automated repository for various integrated simulations (JARVIS) database. This dataset contains configurations from the QM9 dataset, originally created as part of the datasets at quantum-machine.org. Units for r2 (electronic spatial extent) are a^2; for alpha (isotropic polarizability), a^3; for mu (dipole moment), D; for Cv (heat capacity), cal/mol K. Units for all other properties are eV. JARVIS is a set of tools and collected datasets built to meet current materials design challenges.For the first iteration of DFT calculations, Gaussian 09's default electronic and geometry thresholds have been used for all molecules. For those molecules which failed to reach SCF convergence ultrafine grids have been invoked within a second iteration for evaluating the XC energy contributions. Within a third iteration on the remaining unconverged molecules, we identified those which had relaxed to saddle points, and further tightened the SCF criteria using the keyword scf(maxcycle=200, verytight). All those molecules which still featured imaginary frequencies entered the fourth iteration using keywords, opt(calcfc, maxstep=5, maxcycles=1000). calcfc constructs a Hessian in the first step of the geometry relaxation for eigenvector following. Within the fifth and final iteration, all molecules which still failed to reach convergence, have subsequently been converged using opt(calcall, maxstep=1, maxcycles=1000)

Dataset authors

Raghunathan Ramakrishnan, Pavlo O. Dral, Matthias Rupp, O. Anatole von Lilienfeld

Publication

https://doi.org/10.1038/sdata.2014.22

Original data link

https://ndownloader.figshare.com/files/28715319

License

unknown

Number of unique molecular configurations

130829

Number of atoms

2359192

Elements included

C, F, H, N, O

Properties included

energy

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Usage

• ds.parquet : Aggregated dataset information.
• co/ directory: Configuration rows each include a structure, calculated properties, and metadata.
• cs/ directory : Configuration sets are subsets of configurations grouped by some common characteristic. If cs/ does not exist, no configurations sets have been defined for this dataset.
• cs_co_map/ directory : The mapping of configurations to configuration sets (if defined).
  

ColabFit Exchange documentation includes descriptions of content and example code for parsing parquet files:

• Parquet parsing: example code
• Dataset info schema
• Configuration schema
• Configuration set schema
• Configuration set to configuration mapping schema