The structure of α-type cesium antimony nonachloride, Cs3Sb2Cl9

Abstract

Abstract The α-type CS3Sb2Cl9 crystal is trigonal, with unit-coll dimensions a = 7.633, c = 9.345 Å, Z = 1, and space group P321. The atomic arrangement is essentially based on closest packing of cesium and chlorine; embedded in this environment are SbCl3 molecules with bond angle 94°58′ and distances Sb–Cl = 2.42 Å, Cl–Cl = 3.56 Å. This arrangement is similar to that of CS3AS2Cl9.