Materials Data on KSb2PO8 by Materials Project

Abstract

KSb2PO8 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.82–3.36 Å. There are two inequivalent Sb5+ sites. In the first Sb5+ site, Sb5+ is bonded to six O2- atoms to form SbO6 octahedra that share corners with four SbO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 50–52°. There are a spread of Sb–O bond distances ranging from 1.97–2.08 Å. In the second Sb5+ site, Sb5+ is bonded to six O2- atoms to form SbO6 octahedra that share corners with two equivalent SbO6 octahedra, corners with two equivalent PO4 tetrahedra, and an edgeedge with one SbO6 octahedra. The corner-sharing octahedra tilt angles range from 50–52°. There are a spread of Sb–O bond distances ranging from 1.96–2.11 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four SbO6 octahedra. The corner-sharing octahedra tilt angles range from 27–53°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sb5+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one K1+ and two Sb5+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sb5+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+ and two Sb5+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sb5+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent K1+ and two equivalent Sb5+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent K1+ and two equivalent Sb5+ atoms. In the eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Sb5+, and one P5+ atom.