VEC

VEC is a DOS program that comes with the book. Makes predictions for the most probable structural features of valence compounds (Zintl phases). For a given chemical formula crystal chemical, parameters are calculated which are used to predict the average number of homonuclear bonds. Assuming that a structure with an anionic or neutral tetrahedron complex exists, these parameters serve also to select the probable base tetrahedra with which the complex can be constructed. On the screen are shown schematic drawings of the selected base tetrahedra.