Materials Data on Sc7CBr12 by Materials Project

Abstract

Sc7CBr12 is Calaverite-derived structured and crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are three inequivalent Sc+2.29+ sites. In the first Sc+2.29+ site, Sc+2.29+ is bonded to six Br1- atoms to form edge-sharing ScBr6 octahedra. There are three shorter (2.66 Å) and three longer (2.78 Å) Sc–Br bond lengths. In the second Sc+2.29+ site, Sc+2.29+ is bonded to one C4- and five Br1- atoms to form distorted ScCBr5 octahedra that share corners with three ScCBr5 octahedra and edges with six ScBr6 octahedra. The corner-sharing octahedra tilt angles range from 3–7°. The Sc–C bond length is 2.28 Å. There are a spread of Sc–Br bond distances ranging from 2.67–3.14 Å. In the third Sc+2.29+ site, Sc+2.29+ is bonded to one C4- and five Br1- atoms to form distorted ScCBr5 octahedra that share corners with three ScCBr5 octahedra and edges with six ScBr6 octahedra. The corner-sharing octahedra tilt angles range from 3–7°. The Sc–C bond length is 2.29 Å. There are a spread of Sc–Br bond distances ranging from 2.72–3.16 Å. C4- is bonded in an octahedral geometry to six Sc+2.29+ atoms. There are four inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 3-coordinate geometry to three Sc+2.29+ atoms. In the second Br1- site, Br1- is bonded in a 3-coordinate geometry to three Sc+2.29+ atoms. In the third Br1- site, Br1- is bonded in a distorted T-shaped geometry to three Sc+2.29+ atoms. In the fourth Br1- site, Br1- is bonded in a 3-coordinate geometry to three Sc+2.29+ atoms.