Materials Data on Cr4(SeS)3 by Materials Project

Abstract

Cr4(SeS)3 is Ilmenite-like structured and crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are four inequivalent Cr3+ sites. In the first Cr3+ site, Cr3+ is bonded to three equivalent Se2- and three equivalent S2- atoms to form a mixture of corner and edge-sharing CrSe3S3 octahedra. The corner-sharing octahedra tilt angles range from 46–48°. All Cr–Se bond lengths are 2.52 Å. All Cr–S bond lengths are 2.41 Å. In the second Cr3+ site, Cr3+ is bonded to three equivalent Se2- and three equivalent S2- atoms to form a mixture of corner and face-sharing CrSe3S3 octahedra. The corner-sharing octahedra tilt angles range from 46–50°. All Cr–Se bond lengths are 2.56 Å. All Cr–S bond lengths are 2.36 Å. In the third Cr3+ site, Cr3+ is bonded to three equivalent Se2- and three equivalent S2- atoms to form a mixture of corner, edge, and face-sharing CrSe3S3 octahedra. The corner-sharing octahedral tilt angles are 50°. All Cr–Se bond lengths are 2.54 Å. All Cr–S bond lengths are 2.42 Å. In the fourth Cr3+ site, Cr3+ is bonded to three equivalent Se2- and three equivalent S2- atoms to form a mixture of corner, edge, and face-sharing CrSe3S3 octahedra. The corner-sharing octahedral tilt angles are 48°. All Cr–Se bond lengths are 2.52 Å. All Cr–S bond lengths are 2.35 Å. Se2- is bonded in a rectangular see-saw-like geometry to four Cr3+ atoms. S2- is bonded in a distorted rectangular see-saw-like geometry to four Cr3+ atoms.