Materials Data on Ti2Nb2Sb3O14 by Materials Project
Ti2Nb2Sb3O14 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ti4+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 43–51°. There are a spread of Ti–O bond distances ranging from 1.80–2.34 Å. Nb+4.50+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–44°. There are a spread of Nb–O bond distances ranging from 1.86–2.15 Å. There are two inequivalent Sb+3.67+ sites. In the first Sb+3.67+ site, Sb+3.67+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Sb–O bond distances ranging from 2.01–2.27 Å. In the second Sb+3.67+ site, Sb+3.67+ is bonded in a distorted rectangular see-saw-like geometry to four equivalent O2- atoms. There are two shorter (2.04 Å) and two longer (2.25 Å) Sb–O bond lengths. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to one Ti4+ and two equivalent Sb+3.67+ atoms. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Ti4+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to three equivalent Ti4+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Nb+4.50+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Nb+4.50+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Nb+4.50+ and two equivalent Sb+3.67+ atoms. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to one Nb+4.50+ and two equivalent Sb+3.67+ atoms.