Materials Data on CrWO4 by Materials Project

Abstract

CrWO4 is Hydrophilite-derived structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. W6+ is bonded to six O2- atoms to form WO6 octahedra that share corners with eight equivalent CrO6 octahedra and edges with two equivalent WO6 octahedra. The corner-sharing octahedra tilt angles range from 47–51°. There are two shorter (1.97 Å) and four longer (2.03 Å) W–O bond lengths. Cr2+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with eight equivalent WO6 octahedra and edges with two equivalent CrO6 octahedra. The corner-sharing octahedra tilt angles range from 47–51°. There are a spread of Cr–O bond distances ranging from 2.01–2.07 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent W6+ and one Cr2+ atom. In the second O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent W6+ and one Cr2+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one W6+ and two equivalent Cr2+ atoms.