Materials Data on NaCo(PO3)3 by Materials Project

Abstract

NaCo(PO3)3 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. All Na–O bond lengths are 2.49 Å. Co2+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six equivalent PO4 tetrahedra. There are three shorter (2.12 Å) and three longer (2.13 Å) Co–O bond lengths. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent CoO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 50–55°. There are a spread of P–O bond distances ranging from 1.50–1.63 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Co2+, and one P5+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent P5+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Co2+, and one P5+ atom.