Rb2(WO4)3 crystallizes in the trigonal R-3m space group. Rb(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form RbO6 octahedra that share corners with nine equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 70-71°. W(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form WO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with six equivalent Rb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-71°. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1) and one W(1) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1) and two equivalent W(1) atoms.
Rb2(WO4)3 crystallizes in the trigonal R-3m space group. Rb(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form RbO6 octahedra that share corners with nine equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 70-71°. All Rb(1)-O(1) bond lengths are 3.21 Å. All Rb(1)-O(2) bond lengths are 3.17 Å. W(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form WO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with six equivalent Rb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-71°. Both W(1)-O(2) bond lengths are 1.89 Å. All W(1)-O(1) bond lengths are 1.97 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1) and one W(1) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1) and two equivalent W(1) atoms.