Materials Data on BaVCdP2O9 by Materials Project
BaVCdP2O9 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.20 Å. V4+ is bonded to five O2- atoms to form distorted VO5 trigonal bipyramids that share corners with four equivalent PO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.63–2.04 Å. Cd2+ is bonded in a 4-coordinate geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.21–2.76 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent VO5 trigonal bipyramids. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one V4+, and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Ba2+, one Cd2+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one V4+, one Cd2+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, one Cd2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a single-bond geometry to one Ba2+ and one V4+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, two equivalent Cd2+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one V4+, one Cd2+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one V4+, and one P5+ atom.