Materials Data on MnV2Pb2O9 by Materials Project
V2MnPb2O9 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 corners with two equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of V–O bond distances ranging from 1.66–1.87 Å. In the second V5+ site, V5+ is bonded to four O2- atoms to form VO4 tetrahedra that share corners with two equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 60°. There are a spread of V–O bond distances ranging from 1.68–1.80 Å. Mn4+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four VO4 tetrahedra and edges with two equivalent MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.92–1.97 Å. There are two inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Pb–O bond distances ranging from 2.41–3.25 Å. In the second Pb2+ site, Pb2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.43–2.87 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one V5+ and three Pb2+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one V5+ and one Pb2+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one V5+ and two equivalent Mn4+ atoms. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one V5+ and three Pb2+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one V5+, one Mn4+, and two Pb2+ atoms. In the sixth O2- site, O2- is bonded in a single-bond geometry to one V5+ and one Pb2+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mn4+ and one Pb2+ atom.