CRYST - a system to display 3D images of crystal structure, symmetry operations and crystal forms

CRYST is a three-dimensional computer graphics program to help the understanding of crystallographic procedures. The three-dimensional image of a crystal structure is displayed, together with the arrangement of the symmetry elements in the unit cell. The symmetry-related atoms can be generated successively on a graphics screen by designating symmetry elements with a pen and tablet. Changes in morphology of a growing crystal may also be drawn by computer. Several applications of the system are described.