This repository has properties for different groups of material. The main idea is to provide accessible properties for comparison. References for the material properties are provided in the file materials_references.bib.
Right now the properties are stored in Tab Separated Value files (.tsv) for simplicity. They are not a robust solution, but they can be easily imported in Python and JavaScript scripts. For material properties, minimum and maximum values are provided in common units.
If you want to add properties for materials in some of the groups you can check the format and units in the corresponding file. The references should go in materials_references.bib and the bibtex-key should go in the field for references of the file.
The data present in this repository is made available under the Open Data Commons Attribution License. Code is availabe under MIT license.