Materials Data on Sr5P3BrO12 by Materials Project

Abstract

Sr5P3O12Br crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 3-coordinate geometry to six O2- and two equivalent Br1- atoms. There are a spread of Sr–O bond distances ranging from 2.44–3.03 Å. Both Sr–Br bond lengths are 3.20 Å. In the second Sr2+ site, Sr2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.61–2.91 Å. P5+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.56 Å) and one longer (1.57 Å) P–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three Sr2+ and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Sr2+ and one P5+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one P5+ atom. Br1- is bonded to six equivalent Sr2+ atoms to form distorted face-sharing BrSr6 octahedra.