Materials Data on V4CoCuO12 by Materials Project
V4CoCuO12 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are two inequivalent V5+ sites. In the first V5+ site, V5+ is bonded to four O2- atoms to form VO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two equivalent CuO6 octahedra, and corners with two equivalent VO4 tetrahedra. The corner-sharing octahedra tilt angles range from 32–59°. There are a spread of V–O bond distances ranging from 1.69–1.79 Å. In the second V5+ site, V5+ is bonded to four O2- atoms to form VO4 tetrahedra that share a cornercorner with one CuO6 octahedra, corners with two equivalent CoO6 octahedra, and corners with two equivalent VO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–65°. There are a spread of V–O bond distances ranging from 1.69–1.81 Å. Co2+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six VO4 tetrahedra and edges with two equivalent CuO6 octahedra. There are a spread of Co–O bond distances ranging from 1.95–2.26 Å. Cu2+ is bonded to six O2- atoms to form distorted CuO6 octahedra that share corners with six VO4 tetrahedra and edges with two equivalent CoO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.95–2.49 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one V5+, one Co2+, and one Cu2+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one V5+ and one Cu2+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one V5+, one Co2+, and one Cu2+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two V5+ atoms. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two V5+ atoms. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one V5+ and one Co2+ atom.