Materials Data on Cd4Ge(SeS)3 by Materials Project

Abstract

Cd4Ge(SeS)3 is Chalcostibite-derived structured and crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are four inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded to three Se2- and one S2- atom to form CdSe3S tetrahedra that share corners with two equivalent GeSeS3 tetrahedra, corners with six CdSe3S tetrahedra, and corners with two equivalent CdSe2S2 trigonal pyramids. There are a spread of Cd–Se bond distances ranging from 2.67–2.71 Å. The Cd–S bond length is 2.66 Å. In the second Cd2+ site, Cd2+ is bonded to three Se2- and one S2- atom to form CdSe3S tetrahedra that share corners with two equivalent GeSeS3 tetrahedra, corners with five CdSe3S tetrahedra, and corners with three equivalent CdSe2S2 trigonal pyramids. There are two shorter (2.68 Å) and one longer (2.75 Å) Cd–Se bond lengths. The Cd–S bond length is 2.60 Å. In the third Cd2+ site, Cd2+ is bonded to two Se2- and two S2- atoms to form distorted CdSe2S2 trigonal pyramids that share corners with two equivalent GeSeS3 tetrahedra and corners with eight CdSe3S tetrahedra. There are one shorter (2.69 Å) and one longer (2.72 Å) Cd–Se bond lengths. There are one shorter (2.59 Å) and one longer (2.74 Å) Cd–S bond lengths. In the fourth Cd2+ site, Cd2+ is bonded to two Se2- and two S2- atoms to form CdSe2S2 tetrahedra that share corners with two equivalent GeSeS3 tetrahedra, corners with five CdSe3S tetrahedra, and corners with three equivalent CdSe2S2 trigonal pyramids. There are one shorter (2.69 Å) and one longer (2.73 Å) Cd–Se bond lengths. There are one shorter (2.60 Å) and one longer (2.61 Å) Cd–S bond lengths. Ge4+ is bonded to one Se2- and three S2- atoms to form GeSeS3 tetrahedra that share corners with six CdSe3S tetrahedra and corners with two equivalent CdSe2S2 trigonal pyramids. The Ge–Se bond length is 2.37 Å. There are two shorter (2.23 Å) and one longer (2.25 Å) Ge–S bond lengths. There are three inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to four Cd2+ atoms to form corner-sharing SeCd4 tetrahedra. In the second Se2- site, Se2- is bonded to four Cd2+ atoms to form corner-sharing SeCd4 tetrahedra. In the third Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to two Cd2+ and one Ge4+ atom. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted trigonal non-coplanar geometry to two Cd2+ and one Ge4+ atom. In the second S2- site, S2- is bonded in a distorted trigonal non-coplanar geometry to two Cd2+ and one Ge4+ atom. In the third S2- site, S2- is bonded in a trigonal non-coplanar geometry to two Cd2+ and one Ge4+ atom.