Materials Data on CsCr(SO4)2 by Materials Project

Abstract

CsCr(SO4)2 crystallizes in the trigonal P321 space group. The structure is three-dimensional. Cs1+ is bonded to six equivalent O2- atoms to form distorted CsO6 cuboctahedra that share corners with six equivalent SO4 tetrahedra and edges with six equivalent CsO6 cuboctahedra. All Cs–O bond lengths are 3.18 Å. Cr3+ is bonded to six equivalent O2- atoms to form distorted CrO6 octahedra that share corners with six equivalent SO4 tetrahedra. All Cr–O bond lengths are 2.01 Å. S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with three equivalent CsO6 cuboctahedra and corners with three equivalent CrO6 octahedra. The corner-sharing octahedral tilt angles are 28°. There is one shorter (1.46 Å) and three longer (1.49 Å) S–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr3+ and one S6+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to three equivalent Cs1+ and one S6+ atom.