Comparative Crystal-Chemical Analysis of Anhydrous Salts M_y(TQ_4)_z (T = Si, Ge, P, As; Q = S, Se, Te) and Binary Compounds

摘要

Topological analysis and crystal-chemical classification of 67 compounds with tetrahedral anions with the general formula M_y(TQ_4)_z (T = Si, Ge, P, As; Q = S, Se, Te) have been carried out. These compounds are classified into 36 topological and 38 structure types. Cases of similarity of ternary anhydrous salts M_y(TQ_4)_z to binary compounds A_yX_z are revealed and discussed with the use of the TOPOS structural topological program package. Analysis of the topology and uniformity of ionic matrices shows that the matrices of chalco-genide ions and tetrahedral TQ_4~(y-) anions play, as a rule, a leading structural role in M_y(TQ_4)_z compounds.