Materials Data on BaTi6O12 by Materials Project

Abstract

BaTi6O12 crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.78 Å) and four longer (3.22 Å) Ba–O bond lengths. There are two inequivalent Ti+3.67+ sites. In the first Ti+3.67+ site, Ti+3.67+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Ti–O bond distances ranging from 1.95–2.04 Å. In the second Ti+3.67+ site, Ti+3.67+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Ti–O bond distances ranging from 1.95–2.04 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to three Ti+3.67+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ba2+ and three Ti+3.67+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to three Ti+3.67+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+ and three Ti+3.67+ atoms.