Materials Data on Ba6Li2Ti16O39 by Materials Project
Li2Ba6Ti16O39 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Li1+ is bonded to six O2- atoms to form distorted LiO6 octahedra that share corners with three TiO6 octahedra and edges with four TiO6 octahedra. The corner-sharing octahedra tilt angles range from 17–23°. There are a spread of Li–O bond distances ranging from 1.93–2.27 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.23 Å. In the second Ba2+ site, Ba2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.26 Å. There are five inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form distorted TiO6 octahedra that share a cornercorner with one TiO6 octahedra, an edgeedge with one LiO6 octahedra, and edges with four TiO6 octahedra. The corner-sharing octahedral tilt angles are 24°. There are a spread of Ti–O bond distances ranging from 1.84–2.18 Å. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share a cornercorner with one LiO6 octahedra, corners with two TiO6 octahedra, and edges with four TiO6 octahedra. The corner-sharing octahedra tilt angles range from 15–23°. There are a spread of Ti–O bond distances ranging from 1.87–2.14 Å. In the third Ti4+ site, Ti4+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ti–O bond distances ranging from 1.76–2.35 Å. In the fourth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with four TiO6 octahedra, an edgeedge with one LiO6 octahedra, and edges with two TiO6 octahedra. The corner-sharing octahedra tilt angles range from 3–17°. There are a spread of Ti–O bond distances ranging from 1.91–2.09 Å. In the fifth Ti4+ site, Ti4+ is bonded to six O2- atoms to form distorted TiO6 octahedra that share a cornercorner with one LiO6 octahedra, corners with three TiO6 octahedra, and edges with two equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 0–17°. There are a spread of Ti–O bond distances ranging from 1.75–2.21 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to one Li1+, two equivalent Ba2+, and two equivalent Ti4+ atoms. In the second O2- site, O2- is bonded to one Li1+ and three Ti4+ atoms to form a mixture of distorted edge and corner-sharing OLiTi3 trigonal pyramids. In the third O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+ and four Ti4+ atoms. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, one Ba2+, and three Ti4+ atoms. In the fifth O2- site, O2- is bonded to four Ti4+ atoms to form a mixture of distorted edge and corner-sharing OTi4 trigonal pyramids. In the sixth O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Ba2+ and three Ti4+ atoms. In the seventh O2- site, O2- is bonded in a distorted linear geometry to two Ba2+ and two Ti4+ atoms. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, two equivalent Ba2+, and one Ti4+ atom. In the ninth O2- site, O2- is bonded in a distorted water-like geometry to two Ba2+ and two Ti4+ atoms. In the tenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two equivalent Ba2+, and one Ti4+ atom. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+ and two Ti4+ atoms. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to two Ba2+ and two Ti4+ atoms. In the thirteenth O2- site, O2- is bonded in a linear geometry to four Ba2+ and two equivalent Ti4+ atoms. In the fourteenth O2- site, O2- is bonded in a linear geometry to four equivalent Ba2+ and two equivalent Ti4+ atoms.