Materials Data on TlCoCl3 by Materials Project

Abstract

TlCoCl3 crystallizes in the hexagonal P6_3cm space group. The structure is three-dimensional. there are two inequivalent Co2+ sites. In the first Co2+ site, Co2+ is bonded to six equivalent Cl1- atoms to form CoCl6 octahedra that share corners with six equivalent TlCl12 cuboctahedra, faces with six equivalent TlCl12 cuboctahedra, and faces with two equivalent CoCl6 octahedra. There are three shorter (2.42 Å) and three longer (2.43 Å) Co–Cl bond lengths. In the second Co2+ site, Co2+ is bonded to six equivalent Cl1- atoms to form CoCl6 octahedra that share corners with six equivalent TlCl12 cuboctahedra, faces with six equivalent TlCl12 cuboctahedra, and faces with two equivalent CoCl6 octahedra. There are three shorter (2.42 Å) and three longer (2.43 Å) Co–Cl bond lengths. Tl1+ is bonded to twelve Cl1- atoms to form distorted TlCl12 cuboctahedra that share corners with six equivalent TlCl12 cuboctahedra, corners with six CoCl6 octahedra, faces with eight equivalent TlCl12 cuboctahedra, and faces with six CoCl6 octahedra. The corner-sharing octahedra tilt angles range from 14–19°. There are a spread of Tl–Cl bond distances ranging from 3.45–3.82 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent Co2+ and four equivalent Tl1+ atoms. In the second Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent Co2+ and four equivalent Tl1+ atoms.