DOE OSTI2020
Ba2Sr3Nb10O30 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.74–3.18 Å. In the second Ba2+ site, Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.80–2.97 Å. There are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 4-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.60–3.14 Å. In the second Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form SrO12 cuboctahedra that share faces with two equivalent SrO12 cuboctahedra and faces with eight NbO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.67–2.91 Å. In the third Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form SrO12 cuboctahedra that share faces with two equivalent SrO12 cuboctahedra and faces with eight NbO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.66–2.94 Å. There are ten inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 10–37°. There are a spread of Nb–O bond distances ranging from 1.87–2.21 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 8–39°. There are a spread of Nb–O bond distances ranging from 1.89–2.19 Å. In the third Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 10–42°. There are a spread of Nb–O bond distances ranging from 1.89–2.21 Å. In the fourth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 6–47°. There are a spread of Nb–O bond distances ranging from 1.90–2.17 Å. In the fifth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 7–42°. There are a spread of Nb–O bond distances ranging from 1.90–2.17 Å. In the sixth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 12–47°. There are a spread of Nb–O bond distances ranging from 1.88–2.21 Å. In the seventh Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 7–39°. There are a spread of Nb–O bond distances ranging from 1.89–2.18 Å. In the eighth Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 10–42°. There are a spread of Nb–O bond distances ranging from 1.86–2.22 Å. In the ninth Nb5+ site, Nb5+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 1–42°. There are a spread of Nb–O bond distances ranging from 1.86–2.21 Å. In the tenth Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 11–38°. There are a spread of Nb–O bond distances ranging from 1.84–2.25 Å. There are thirty inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to one Ba2+, one Sr2+, and two equivalent Nb5+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+ and two equivalent Nb5+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the fifth O2- site, O2- is bonded in a distorted linear geometry to two equivalent Sr2+ and two Nb5+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Ba2+ and two Nb5+ atoms. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ atoms. In the fourteenth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+ and two Nb5+ atoms. In the fifteenth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+ and two Nb5+ atoms. In the sixteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Ba2+ and two Nb5+ atoms. In the eighteenth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms. In the nineteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+ and two equivalent Nb5+ atoms. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two equivalent Nb5+ atoms. In the twenty-first O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Sr2+, and two equivalent Nb5+ atoms. In the twenty-second O2- site, O2- is bonded in a 2-coordinate geometry to two Sr2+ and two equivalent Nb5+ atoms. In the twenty-third O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Sr2+, and two equivalent Nb5+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 2-coordinate geometry to two Sr2+ and two equivalent Nb5+ atoms. In the twenty-fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two equivalent Nb5+ atoms. In the twenty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+ and two equivalent Nb5+ atoms. In the twenty-seventh O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ atoms. In the twenty-eighth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+ and two Nb5+ atoms. In the twenty-ninth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+ and two Nb5+ atoms. In the thirtieth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+ and two Nb5+ atoms.