Program packages for point groups and space groups with subgroup chain symmetry adaptation Original Research Article

A new program for point groups is released and the program package for space groups by Ping et al. (Comput. Phys. Commun. 52 (1989) 355) is upgraded. The characters, irreducible matrices and Clebsch-Gordan coefficients of any crystallographic point group G or space group G adapted to any canonical group chain G ⊃ H ⊃ K can be calculated ab initio for both single-valued and double-valued representations and tabulated with exact values in the form of image or image.