Materials Data on Ce2Ga2Co15 by Materials Project

Abstract

Ce2Co15Ga2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Ce is bonded in a 10-coordinate geometry to fifteen Co and one Ga atom. There are a spread of Ce–Co bond distances ranging from 2.91–3.19 Å. The Ce–Ga bond length is 3.04 Å. There are three inequivalent Co sites. In the first Co site, Co is bonded to eight Co and two equivalent Ga atoms to form distorted CoGa2Co8 cuboctahedra that share corners with fourteen CoGa2Co8 cuboctahedra, edges with six CoGa2Co8 cuboctahedra, and faces with four equivalent CoCe3GaCo8 cuboctahedra. There are four shorter (2.41 Å) and four longer (2.44 Å) Co–Co bond lengths. Both Co–Ga bond lengths are 2.54 Å. In the second Co site, Co is bonded in a distorted q6 geometry to two equivalent Ce, eight Co, and two equivalent Ga atoms. There are a spread of Co–Co bond distances ranging from 2.43–2.59 Å. Both Co–Ga bond lengths are 2.76 Å. In the third Co site, Co is bonded to three equivalent Ce, eight Co, and one Ga atom to form a mixture of edge, face, and corner-sharing CoCe3GaCo8 cuboctahedra. Both Co–Co bond lengths are 2.47 Å. The Co–Ga bond length is 2.61 Å. Ga is bonded in a 7-coordinate geometry to one Ce, twelve Co, and one Ga atom. The Ga–Ga bond length is 2.60 Å.