RbMoAsO6 crystallizes in the orthorhombic Fddd space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Mo(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted MoO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra. As(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form AsO4 tetrahedra that share corners with four equivalent Mo(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-51°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one Mo(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one Mo(1), and one As(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Rb(1), one Mo(1), and one As(1) atom.
RbMoAsO6 crystallizes in the orthorhombic Fddd space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Both Rb(1)-O(2) bond lengths are 3.07 Å. Both Rb(1)-O(3) bond lengths are 3.07 Å. There are two shorter (3.04 Å) and two longer (3.31 Å) Rb(1)-O(1) bond lengths. Mo(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted MoO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra. Both Mo(1)-O(1) bond lengths are 1.73 Å. Both Mo(1)-O(2) bond lengths are 2.00 Å. Both Mo(1)-O(3) bond lengths are 2.29 Å. As(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form AsO4 tetrahedra that share corners with four equivalent Mo(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-51°. Both As(1)-O(2) bond lengths are 1.78 Å. Both As(1)-O(3) bond lengths are 1.71 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one Mo(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one Mo(1), and one As(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Rb(1), one Mo(1), and one As(1) atom.