Materials Data on Ti2Sn(PO4)3 by Materials Project
Ti2Sn(PO4)3 crystallizes in the trigonal R-3c space group. The structure is three-dimensional. Ti+3.50+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with six equivalent PO4 tetrahedra. There are three shorter (1.94 Å) and three longer (2.08 Å) Ti–O bond lengths. Sn2+ is bonded in a distorted hexagonal planar geometry to six equivalent O2- atoms. All Sn–O bond lengths are 2.52 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 26–38°. There is two shorter (1.54 Å) and two longer (1.55 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Ti+3.50+ and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Ti+3.50+, one Sn2+, and one P5+ atom.