Materials Data on CoSeO4 by Materials Project
CoSeO4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Co2+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six equivalent SeO4 tetrahedra and edges with two equivalent CoO6 octahedra. There are a spread of Co–O bond distances ranging from 1.99–2.28 Å. Se6+ is bonded to four O2- atoms to form SeO4 tetrahedra that share corners with six equivalent CoO6 octahedra. The corner-sharing octahedra tilt angles range from 49–56°. There are a spread of Se–O bond distances ranging from 1.67–1.71 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Co2+ and one Se6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Co2+ and one Se6+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Co2+ and one Se6+ atom.