Materials Data on Ba3Ti3O8 by Materials Project
Ba3Ti3O8 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a distorted q6 geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.83–2.94 Å. In the second Ba2+ site, Ba2+ is bonded in a distorted q6 geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.86–2.90 Å. There are two inequivalent Ti+3.33+ sites. In the first Ti+3.33+ site, Ti+3.33+ is bonded to five O2- atoms to form TiO5 square pyramids that share corners with three equivalent TiO6 octahedra and corners with two equivalent TiO5 square pyramids. The corner-sharing octahedra tilt angles range from 1–8°. There are a spread of Ti–O bond distances ranging from 1.90–2.03 Å. In the second Ti+3.33+ site, Ti+3.33+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. There are four shorter (2.05 Å) and two longer (2.06 Å) Ti–O bond lengths. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to four Ba2+ and two Ti+3.33+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to four Ba2+ and two equivalent Ti+3.33+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to four Ba2+ and two Ti+3.33+ atoms.