Add xxMD-DFT_train files

README.md

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+---
+configs:
+- config_name: default
+  data_files: "co/*.parquet"
+- config_name: info
+  data_files: "ds.parquet"
+- config_name: configuration_sets
+  data_files: "cs/*.parquet"
+- config_name: config_set_mapping
+  data_files: "cs_co_map/*.parquet"
+license: cc-by-4.0
+tags:
+- molecular dynamics
+- mlip
+- interatomic potential
+pretty_name: xxMD-DFT train
+---
+### <details><summary>Cite this dataset </summary>Pengmei, Z., Shu, Y., and Liu, J. _xxMD-DFT train_. ColabFit, 2023. https://doi.org/10.60732/8e7f6d7c</details>  
+#### This dataset has been curated and formatted for the ColabFit Exchange  
+#### This dataset is also available on the ColabFit Exchange:  
+https://materials.colabfit.org/id/DS_fblez5twbr07_0  
+#### Visit the ColabFit Exchange to search additional datasets by author, description, element content and more.  
+https://materials.colabfit.org
+<br><hr>  
+# Dataset  Name  
+xxMD-DFT train  
+### Description  
+Training dataset from xxMD-DFT. The xxMD (Extended Excited-state Molecular Dynamics) dataset is a comprehensive collection of non-adiabatic trajectories encompassing several photo-sensitive molecules. This dataset challenges existing Neural Force Field (NFF) models with broader nuclear configuration spaces that span reactant, transition state, product, and conical intersection regions, making it more chemically representative than its contemporaries. xxMD is divided into two datasets, each with corresponding train, test and validation splits. xxMD-CASSCF contains calculations generated using state-averaged complete active state self-consistent field (SA-CASSCF) electronic theory. xxMD-DFT contains recalculated single-point spin-polarized (unrestricted) DFT values.  
+### Dataset authors  
+Zihan Pengmei, Yinan Shu, Junyu Liu  
+### Publication  
+https://doi.org/10.1038/s41597-024-03019-3  
+### Original data link  
+https://github.com/zpengmei/xxMD  
+### License  
+CC-BY-4.0  
+### Number of unique molecular configurations  
+43385  
+### Number of atoms  
+807298  
+### Elements included  
+C, H, N, O, S  
+### Properties included  
+energy, atomic forces, cauchy stress  
+<br>
+<hr>  
+
+# 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).  
+<br>
+#### ColabFit Exchange documentation includes descriptions of content and example code for parsing parquet files:  
+- [Parquet parsing: example code](https://materials.colabfit.org/docs/how_to_use_parquet)  
+- [Dataset info schema](https://materials.colabfit.org/docs/dataset_schema)  
+- [Configuration schema](https://materials.colabfit.org/docs/configuration_schema)  
+- [Configuration set schema](https://materials.colabfit.org/docs/configuration_set_schema)  
+- [Configuration set to configuration mapping schema](https://materials.colabfit.org/docs/cs_co_mapping_schema)  

co/co_0.parquet

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+size 47702000

cs/cs_0.parquet

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+size 8052

cs_co_map/cs_co_map_0.parquet

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+size 535833

ds.parquet

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+size 19317