Materials Data on Cd5Si(PO6)2 by Materials Project

Abstract

Cd5Si(PO6)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are five inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Cd–O bond distances ranging from 2.29–2.81 Å. In the second Cd2+ site, Cd2+ is bonded to seven O2- atoms to form distorted CdO7 pentagonal bipyramids that share a cornercorner with one SiO4 tetrahedra, corners with two equivalent PO4 tetrahedra, an edgeedge with one SiO4 tetrahedra, and an edgeedge with one PO4 tetrahedra. There are a spread of Cd–O bond distances ranging from 2.29–2.75 Å. In the third Cd2+ site, Cd2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Cd–O bond distances ranging from 2.23–2.88 Å. In the fourth Cd2+ site, Cd2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.26–2.51 Å. In the fifth Cd2+ site, Cd2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.22–2.61 Å. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one CdO7 pentagonal bipyramid and an edgeedge with one CdO7 pentagonal bipyramid. There is two shorter (1.65 Å) and two longer (1.67 Å) Si–O bond length. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share an edgeedge with one CdO7 pentagonal bipyramid. There is one shorter (1.55 Å) and three longer (1.56 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent CdO7 pentagonal bipyramids. There are a spread of P–O bond distances ranging from 1.55–1.57 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three Cd2+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Cd2+ and one P5+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Cd2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Cd2+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to three Cd2+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Cd2+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to three Cd2+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to three Cd2+ and one Si4+ atom. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to three Cd2+ and one P5+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to three Cd2+ and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to three Cd2+ and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to two Cd2+ and one P5+ atom.