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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

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.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr3B6O11F2 by Materials Project

Sr3B6O11F2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 9-coordinate geometry to seven O2- and two F1- atoms. There are a spread of Sr–O bond distances ranging from 2.52–3.16 Å. There are one shorter (2.44 Å) and one longer (2.54 Å) Sr–F bond lengths. In the second Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to six O2- and two equivalent F1- atoms. There are a spread of Sr–O bond distances ranging from 2.63–2.84 Å. There are one shorter (2.44 Å) and one longer (2.47 Å) Sr–F bond lengths. In the third Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to four O2- and two equivalent F1- atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.66 Å. There are one shorter (2.51 Å) and one longer (2.52 Å) Sr–F bond lengths. There are six inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.46–1.53 Å. In the second B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.47–1.51 Å. In the third B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.45–1.51 Å. In the fourth B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.45–1.51 Å. In the fifth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.37 Å) and two longer (1.38 Å) B–O bond length. In the sixth 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 1.37–1.39 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Sr2+ and two B3+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Sr2+ and two B3+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Sr2+ and two B3+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Sr2+ and two B3+ atoms. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two Sr2+ and two B3+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+ and two B3+ atoms. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+ and two B3+ atoms. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Sr2+ and two B3+ atoms. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two B3+ atoms. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Sr2+ and two B3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+ and two B3+ atoms. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a trigonal planar geometry to three Sr2+ atoms. In the second F1- site, F1- is bonded in a trigonal planar geometry to three Sr2+ atoms.

36 MATERIALS SCIENCE↗