Materials Data on Rb2Ti6O13 by Materials Project

Abstract

Rb2Ti6O13 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Rb1+ is bonded in a 6-coordinate geometry to eight O2- atoms. There are a spread of Rb–O bond distances ranging from 2.78–3.21 Å. There are three inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 0–26°. There are a spread of Ti–O bond distances ranging from 1.89–2.19 Å. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles are 29°. There are a spread of Ti–O bond distances ranging from 1.82–2.28 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 1.78–2.33 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to four equivalent Rb1+ and two equivalent Ti4+ atoms. In the second O2- site, O2- is bonded to four Ti4+ atoms to form a mixture of distorted corner and edge-sharing OTi4 trigonal pyramids. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Rb1+ and two Ti4+ atoms. In the fourth O2- site, O2- is bonded to four Ti4+ atoms to form a mixture of distorted corner and edge-sharing OTi4 trigonal pyramids. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Rb1+ and two Ti4+ atoms. In the sixth O2- site, O2- is bonded in a distorted T-shaped geometry to three Ti4+ atoms. In the seventh O2- site, O2- is bonded in a distorted linear geometry to two equivalent Rb1+ and two Ti4+ atoms.