This gem provide a site analysis for crystal cell.

This gem provides Cell, LatticeAxes, Atom classes, and so on. And this provides simple treatment of a periodic boundary condition.

MAth GEOmetry library to deal with 2 and 3 dimensional spaces. Cartesian and internal coordinate systems can be used. This includes besic objects in 3 dimensional space.

This gem provides parsers for some of input and output files for VASP. This will provide support command for computations.