Materials Data on RbTa2O6 by Materials Project

Abstract

RbTa2O6 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Rb is bonded in a 3-coordinate geometry to three O atoms. There are two shorter (3.02 Å) and one longer (3.06 Å) Rb–O bond lengths. There are two inequivalent Ta sites. In the first Ta site, Ta is bonded to six O atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedra tilt angles range from 38–39°. There are a spread of Ta–O bond distances ranging from 1.98–2.01 Å. In the second Ta site, Ta is bonded to six O atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedra tilt angles range from 38–39°. There are a spread of Ta–O bond distances ranging from 1.98–2.00 Å. There are four inequivalent O sites. In the first O site, O is bonded in a distorted bent 150 degrees geometry to one Rb and two equivalent Ta atoms. In the second O site, O is bonded in a bent 150 degrees geometry to two equivalent Ta atoms. In the third O site, O is bonded in a bent 150 degrees geometry to two Ta atoms. In the fourth O site, O is bonded in a distorted bent 150 degrees geometry to one Rb and two Ta atoms.