Materials Data on Sr5B3O9F by Materials Project
Sr5B3O9F crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to seven O2- and one F1- atom. There are a spread of Sr–O bond distances ranging from 2.46–2.79 Å. The Sr–F bond length is 2.41 Å. In the second Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to six O2- and one F1- atom. There are a spread of Sr–O bond distances ranging from 2.52–2.86 Å. The Sr–F bond length is 2.43 Å. In the third 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 2.49–3.09 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.39 Å) and one longer (1.40 Å) B–O bond length. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.38–1.40 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to five Sr2+ and one B3+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four Sr2+ and one B3+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to four Sr2+ and one B3+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to five Sr2+ and one B3+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to three Sr2+ and one B3+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to five Sr2+ and one B3+ atom. F1- is bonded in a trigonal non-coplanar geometry to three Sr2+ atoms.