Materials Data on RbNbWO6 by Materials Project
RbNbWO6 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Rb1+ is bonded to six O2- atoms to form RbO6 octahedra that share corners with six equivalent NbO6 octahedra and corners with six equivalent WO6 octahedra. The corner-sharing octahedra tilt angles range from 69–72°. There are a spread of Rb–O bond distances ranging from 3.28–3.35 Å. Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra, corners with four equivalent WO6 octahedra, and corners with six equivalent RbO6 octahedra. The corner-sharing octahedra tilt angles range from 38–72°. There are two shorter (1.99 Å) and four longer (2.01 Å) Nb–O bond lengths. W6+ is bonded to six O2- atoms to form WO6 octahedra that share corners with two equivalent WO6 octahedra, corners with four equivalent NbO6 octahedra, and corners with six equivalent RbO6 octahedra. The corner-sharing octahedra tilt angles range from 37–71°. There is four shorter (1.93 Å) and two longer (1.95 Å) W–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Rb1+ and two equivalent W6+ atoms. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Rb1+ and two equivalent Nb5+ atoms. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Rb1+, one Nb5+, and one W6+ atom.