RbV2SbO8 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 11-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(3), two equivalent O(5), and four equivalent O(2) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(3), one O(6), and two equivalent O(2) atoms to form VO4 tetrahedra that share corners with three equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 19-39°. In the second V site, V(2) is bonded to one O(4), one O(5), and two equivalent O(1) atoms to form VO4 tetrahedra that share corners with three equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-37°. Sb(1) is bonded to one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form SbO6 octahedra that share corners with three equivalent V(1)O4 tetrahedra and corners with three equivalent V(2)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one V(1) and one Sb(1) atom. In the second O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one V(2), and one Sb(1) atom. In the third O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Rb(1), one V(1), and one Sb(1) atom. In the fourth O site, O(3) is bonded in a single-bond geometry to two equivalent Rb(1) and one V(1) atom. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1) and one V(2) atom. In the sixth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Rb(1), one V(2), and one Sb(1) atom.
RbV2SbO8 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 11-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(3), two equivalent O(5), and four equivalent O(2) atoms. The Rb(1)-O(4) bond length is 2.88 Å. Both Rb(1)-O(1) bond lengths are 3.03 Å. Both Rb(1)-O(3) bond lengths are 3.10 Å. Both Rb(1)-O(5) bond lengths are 3.33 Å. There are two shorter (3.10 Å) and two longer (3.17 Å) Rb(1)-O(2) bond lengths. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(3), one O(6), and two equivalent O(2) atoms to form VO4 tetrahedra that share corners with three equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 19-39°. The V(1)-O(3) bond length is 1.64 Å. The V(1)-O(6) bond length is 1.75 Å. Both V(1)-O(2) bond lengths are 1.81 Å. In the second V site, V(2) is bonded to one O(4), one O(5), and two equivalent O(1) atoms to form VO4 tetrahedra that share corners with three equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-37°. The V(2)-O(4) bond length is 1.63 Å. The V(2)-O(5) bond length is 1.80 Å. Both V(2)-O(1) bond lengths are 1.79 Å. Sb(1) is bonded to one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form SbO6 octahedra that share corners with three equivalent V(1)O4 tetrahedra and corners with three equivalent V(2)O4 tetrahedra. The Sb(1)-O(5) bond length is 2.00 Å. The Sb(1)-O(6) bond length is 2.00 Å. Both Sb(1)-O(1) bond lengths are 2.00 Å. Both Sb(1)-O(2) bond lengths are 2.00 Å. There are six inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to one V(1) and one Sb(1) atom. In the second O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one V(2), and one Sb(1) atom. In the third O site, O(2) is bonded in a 2-coordinate geometry to two equivalent Rb(1), one V(1), and one Sb(1) atom. In the fourth O site, O(3) is bonded in a single-bond geometry to two equivalent Rb(1) and one V(1) atom. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1) and one V(2) atom. In the sixth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Rb(1), one V(2), and one Sb(1) atom.