Materials Data on Ce2Co7 by Materials Project

Ce2Co7 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Ce sites. In the first Ce site, Ce is bonded in a 12-coordinate geometry to twelve Co atoms. There are a spread of Ce–Co bond distances ranging from 2.83–3.18 Å. In the second Ce site, Ce is bonded in a 6-coordinate geometry to eighteen Co atoms. There are a spread of Ce–Co bond distances ranging from 2.82–3.25 Å. There are seven inequivalent Co sites. In the first Co site, Co is bonded in a 12-coordinate geometry to three equivalent Ce and nine Co atoms. There are a spread of Co–Co bond distances ranging from 2.44–2.85 Å. In the second Co site, Co is bonded in a 12-coordinate geometry to three equivalent Ce and nine Co atoms. There are a spread of Co–Co bond distances ranging from 2.41–2.51 Å. In the third Co site, Co is bonded to six equivalent Ce and six Co atoms to form CoCe6Co6 cuboctahedra that share corners with twelve CoCe5Co7 cuboctahedra, edges with six equivalent CoCe6Co6 cuboctahedra, and faces with eighteen CoCe5Co7 cuboctahedra. There are two shorter (2.55 Å) and four longer (2.56 Å) Co–Co bond lengths. In the fourth Co site, Co is bonded to four equivalent Ce and eight Co atoms to form CoCe4Co8 cuboctahedra that share corners with sixteen CoCe4Co8 cuboctahedra, edges with ten CoCe5Co7 cuboctahedra, and faces with ten CoCe4Co8 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.43–2.46 Å. In the fifth Co site, Co is bonded to four equivalent Ce and eight Co atoms to form CoCe4Co8 cuboctahedra that share corners with sixteen CoCe4Co8 cuboctahedra, edges with ten CoCe5Co7 cuboctahedra, and faces with ten CoCe4Co8 cuboctahedra. In the sixth Co site, Co is bonded to five Ce and seven Co atoms to form distorted CoCe5Co7 cuboctahedra that share corners with seventeen CoCe6Co6 cuboctahedra, edges with eight CoCe5Co7 cuboctahedra, and faces with fourteen CoCe6Co6 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.43–2.47 Å. In the seventh Co site, Co is bonded to five Ce and seven Co atoms to form distorted CoCe5Co7 cuboctahedra that share corners with seventeen CoCe6Co6 cuboctahedra, edges with eight CoCe5Co7 cuboctahedra, and faces with fourteen CoCe6Co6 cuboctahedra.