Crystal Structure of a High-Temperature Modification of Cs2SO4

Abstract

This article presents the results of the refinement of the crystal structure of α-Cs₂SO₄ at a temperature of 800°C in the edge and apex models. The arrangement of the oxygen atoms’ sites, which are not fixed by symmetry, unlike the Cs and S sites, is clarified. It is proposed that the edge model better corresponds to the experimental data and satisfies the crystallochemical parameters. However, the bond lengths in the apex model are in better agreement with the published data.