DOI: 10.17188/1654736
title: Materials Data on BaSr3Zr2Ti2O12 by Materials Project

description: BaSr3Zr2Ti2O12 is (Cubic) Perovskite-derived structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share corners with six equivalent BaO12 cuboctahedra, corners with six equivalent SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, faces with four ZrO6 octahedra, and faces with four TiO6 octahedra. There are a spread of Ba–O bond distances ranging from 2.86–3.00 Å. There are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form SrO12 cuboctahedra that share corners with twelve SrO12 cuboctahedra, faces with three equivalent BaO12 cuboctahedra, faces with three equivalent SrO12 cuboctahedra, faces with two ZrO6 octahedra, and faces with six TiO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.85–2.89 Å. In the second Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form SrO12 cuboctahedra that share corners with six equivalent BaO12 cuboctahedra, corners with six equivalent SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, faces with four ZrO6 octahedra, and faces with four TiO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.78–2.95 Å. In the third Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form SrO12 cuboctahedra that share corners with twelve SrO12 cuboctahedra, faces with three equivalent BaO12 cuboctahedra, faces with three equivalent SrO12 cuboctahedra, faces with two TiO6 octahedra, and faces with six ZrO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.89–2.95 Å. There are two inequivalent Zr4+ sites. In the first Zr4+ site, Zr4+ is bonded to six O2- atoms to form ZrO6 octahedra that share corners with three equivalent ZrO6 octahedra, corners with three equivalent TiO6 octahedra, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are three shorter (2.08 Å) and three longer (2.11 Å) Zr–O bond lengths. In the second Zr4+ site, Zr4+ is bonded to six O2- atoms to form ZrO6 octahedra that share corners with three equivalent ZrO6 octahedra, corners with three equivalent TiO6 octahedra, faces with three equivalent BaO12 cuboctahedra, and faces with five SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are three shorter (2.08 Å) and three longer (2.12 Å) Zr–O bond lengths. There are two inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with three equivalent ZrO6 octahedra, corners with three equivalent TiO6 octahedra, faces with three equivalent BaO12 cuboctahedra, and faces with five SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There is three shorter (1.98 Å) and three longer (2.00 Å) Ti–O bond length. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with three equivalent ZrO6 octahedra, corners with three equivalent TiO6 octahedra, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There is three shorter (1.96 Å) and three longer (2.02 Å) Ti–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to two equivalent Ba2+, two Sr2+, one Zr4+, and one Ti4+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to one Ba2+, three Sr2+, and two Ti4+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to four Sr2+, one Zr4+, and one Ti4+ atom. In the fourth O2- site, O2- is bonded in a distorted linear geometry to one Ba2+, three Sr2+, and two Zr4+ atoms.