A material in GeoDict can either be a predefined material, which is selected from the GeoDict material database, or set to be Manual. In some cases, the material for a given Material ID might be unclear. Then, the material is Undefined.

Manual materials allow to quickly set the required parameters, whereas using materials from the material database allows to use the predefined parameter values.

Materials can be defined during the creation of a microstructure using the GeoDict structure generation modules or prior to simulation with one of the GeoDict predictor modules. For a structure in memory, the materials can also be changed independently of any module.l

Different parameters from various application fields can be entered and saved for all materials, except for undefined materials. Depending on the material type, different parameters of the material must be entered.