The material constants are stored in the data structure JMATE via the routine GSMATE and can be retrieved via the routine GFMATE and printed via the routine GPMATE. The routine GMATE calls repeatedly the routine GSMATE to define a standard set of materials, but its use is not mandatory. Mixtures of basic materials, compounds or molecules with atoms from different basic materials, may also be defined and their characteristics are stored in the structure JMATE, through calls to the routine GSMIXT. Mixtures of compounds are allowed.
Quantities such as energy loss and cross-section tables (see [PHYS]), computed during the initialisation of the program are stored in the structure JMATE. These can be accessed through the routine GFTMAT and plotted or printed through the routines GPLMAT and GPRMAT respectively.