In the refractive_index/ folder there are three files. One MP(Materials Project) database file for refractive index and another with important features. The refractive_model.py should be run to build the model.

In the vickers_hardness/ folder there are three files. One MP(Materials Project) database file for Vickers hardness and another is a file with important features. The model.py should be run to build the model.