Materials Data on K3In(PO4)2 by Materials Project

Abstract

K3In(PO4)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.76–2.89 Å. In the second K1+ site, K1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of K–O bond distances ranging from 2.62–2.83 Å. In the third K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.67–3.13 Å. In the fourth K1+ site, K1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.60–2.93 Å. In3+ is bonded to six O2- atoms to form InO6 octahedra that share corners with four PO4 tetrahedra and an edgeedge with one PO4 tetrahedra. There are a spread of In–O bond distances ranging from 2.13–2.29 Å. 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 InO6 octahedra and an edgeedge with one InO6 octahedra. The corner-sharing octahedral tilt angles are 33°. 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 three equivalent InO6 octahedra. The corner-sharing octahedra tilt angles range from 33–46°. There are a spread of P–O bond distances ranging from 1.52–1.57 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one In3+, and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one In3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one In3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one In3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one In3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to four K1+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one In3+, and one P5+ atom.