Materials Data on V5Co(PO4)6 by Materials Project

Abstract

V5Co(PO4)6 crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are five inequivalent V+3.20+ sites. In the first V+3.20+ site, V+3.20+ is bonded to six O2- atoms to form distorted VO6 octahedra that share corners with six PO4 tetrahedra, a faceface with one VO6 octahedra, and a faceface with one CoO6 octahedra. There are three shorter (2.09 Å) and three longer (2.15 Å) V–O bond lengths. In the second V+3.20+ site, V+3.20+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There is three shorter (1.88 Å) and three longer (2.02 Å) V–O bond length. In the third V+3.20+ site, V+3.20+ is bonded in a 6-coordinate geometry to six O2- atoms. All V–O bond lengths are 2.21 Å. In the fourth V+3.20+ site, V+3.20+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra and a faceface with one VO6 octahedra. There are three shorter (1.98 Å) and three longer (2.11 Å) V–O bond lengths. In the fifth V+3.20+ site, V+3.20+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra. There is three shorter (1.89 Å) and three longer (2.03 Å) V–O bond length. Co2+ is bonded to six O2- atoms to form distorted CoO6 octahedra that share corners with six PO4 tetrahedra and a faceface with one VO6 octahedra. There are three shorter (1.98 Å) and three longer (2.20 Å) Co–O bond lengths. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CoO6 octahedra and corners with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 26–53°. There are a spread of P–O bond distances ranging from 1.50–1.58 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CoO6 octahedra and corners with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 26–55°. There are a spread of P–O bond distances ranging from 1.52–1.58 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one V+3.20+ and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two V+3.20+ and one P5+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Co2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two V+3.20+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one V+3.20+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one V+3.20+, one Co2+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to two V+3.20+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to one V+3.20+ and one P5+ atom.