DOE OSTI2020
V2(CuO3)3 crystallizes in the monoclinic P2_1/m 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 CuO5 square pyramid, a cornercorner with one VO4 tetrahedra, and corners with three equivalent CuO5 trigonal bipyramids. There are a spread of V–O bond distances ranging from 1.67–1.79 Å. In the second V5+ site, V5+ is bonded to four O2- atoms to form VO4 tetrahedra that share corners with two equivalent CuO5 square pyramids, a cornercorner with one VO4 tetrahedra, and a cornercorner with one CuO5 trigonal bipyramid. There are a spread of V–O bond distances ranging from 1.70–1.79 Å. There are three inequivalent Cu+2.67+ sites. In the first Cu+2.67+ site, Cu+2.67+ is bonded in a distorted square co-planar geometry to four O2- atoms. There is two shorter (1.89 Å) and two longer (1.94 Å) Cu–O bond length. In the second Cu+2.67+ site, Cu+2.67+ is bonded to five O2- atoms to form distorted CuO5 square pyramids that share corners with three VO4 tetrahedra and an edgeedge with one CuO5 trigonal bipyramid. There are a spread of Cu–O bond distances ranging from 1.77–2.40 Å. In the third Cu+2.67+ site, Cu+2.67+ is bonded to five O2- atoms to form distorted CuO5 trigonal bipyramids that share corners with four VO4 tetrahedra and an edgeedge with one CuO5 square pyramid. There are a spread of Cu–O bond distances ranging from 1.88–2.22 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded to four Cu+2.67+ atoms to form corner-sharing OCu4 tetrahedra. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one V5+ and two Cu+2.67+ atoms. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one V5+ and two Cu+2.67+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one V5+ and one Cu+2.67+ atom. In the fifth O2- site, O2- is bonded in a linear geometry to one V5+ and one Cu+2.67+ atom. In the sixth O2- site, O2- is bonded in a linear geometry to two V5+ atoms. In the seventh O2- site, O2- is bonded in a single-bond geometry to one Cu+2.67+ atom.