Materials Data on TiTl2(GeO3)3 by Materials Project

TiTl2(GeO3)3 crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. Ti4+ is bonded to six equivalent O2- atoms to form TiO6 octahedra that share corners with six equivalent GeO4 tetrahedra. All Ti–O bond lengths are 1.98 Å. Tl1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Tl–O bond distances ranging from 2.90–3.27 Å. Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share corners with two equivalent TiO6 octahedra and corners with two equivalent GeO4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are a spread of Ge–O bond distances ranging from 1.74–1.81 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ti4+, two equivalent Tl1+, and one Ge4+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Tl1+ and two equivalent Ge4+ atoms.