Materials Data on Ca(MnS2)4 by Materials Project

Abstract

Ca(MnS2)4 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Ca2+ is bonded in a 6-coordinate geometry to six equivalent S2- atoms. All Ca–S bond lengths are 2.83 Å. There are two inequivalent Mn+3.50+ sites. In the first Mn+3.50+ site, Mn+3.50+ is bonded to six S2- atoms to form edge-sharing MnS6 octahedra. All Mn–S bond lengths are 2.34 Å. In the second Mn+3.50+ site, Mn+3.50+ is bonded to six equivalent S2- atoms to form edge-sharing MnS6 octahedra. All Mn–S bond lengths are 2.33 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a rectangular see-saw-like geometry to one Ca2+ and three Mn+3.50+ atoms. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to three equivalent Mn+3.50+ atoms.