RbMoPO6 crystallizes in the orthorhombic Fddd space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent O(1), four equivalent O(2), and four equivalent O(3) 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 P(1)O4 tetrahedra. P(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with four equivalent Mo(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-44°. There are three inequivalent O sites. In the first O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one Mo(1) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Mo(1), and one P(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1), one Mo(1), and one P(1) atom.
RbMoPO6 crystallizes in the orthorhombic Fddd space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms. Both Rb(1)-O(1) bond lengths are 3.09 Å. There are two shorter (3.15 Å) and two longer (3.44 Å) Rb(1)-O(2) bond lengths. There are two shorter (2.96 Å) and two longer (3.18 Å) Rb(1)-O(3) 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 P(1)O4 tetrahedra. Both Mo(1)-O(1) bond lengths are 2.02 Å. Both Mo(1)-O(2) bond lengths are 2.24 Å. Both Mo(1)-O(3) bond lengths are 1.73 Å. P(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with four equivalent Mo(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-44°. Both P(1)-O(1) bond lengths are 1.57 Å. Both P(1)-O(2) bond lengths are 1.53 Å. There are three inequivalent O sites. In the first O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one Mo(1) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Mo(1), and one P(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1), one Mo(1), and one P(1) atom.