The data is available for download as a JSON file and as a .csv file. Both can be downloaded from the Quantum Cluster Database website. The first level of the JSON file contains a unique index for every cluster, the next level contains the cluster_id described in Table , and the next level contains the other keys described in Table , with the corresponding values. The columns of the .csv file correspond to the keys described in Table . The VASP DFT calculation files for each cluster are available in the NOMAD repository in the form of text files from the inputs and outputs of VASP.