RbB2SbO6 crystallizes in the orthorhombic Pmn2_1 space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. Sb(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles are 2°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Rb(1), one B(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1) and two equivalent B(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Sb(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Rb(1), one B(1), and one Sb(1) atom.
RbB2SbO6 crystallizes in the orthorhombic Pmn2_1 space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. There is one shorter (3.12 Å) and one longer (3.26 Å) Rb(1)-O(2) bond length. Both Rb(1)-O(4) bond lengths are 3.13 Å. There are two shorter (3.01 Å) and two longer (3.07 Å) Rb(1)-O(1) bond lengths. B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. The B(1)-O(1) bond length is 1.38 Å. The B(1)-O(2) bond length is 1.41 Å. The B(1)-O(4) bond length is 1.35 Å. Sb(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing SbO6 octahedra. The corner-sharing octahedral tilt angles are 2°. Both Sb(1)-O(1) bond lengths are 2.01 Å. There is one shorter (1.94 Å) and one longer (1.95 Å) Sb(1)-O(3) bond length. Both Sb(1)-O(4) bond lengths are 1.98 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Rb(1), one B(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1) and two equivalent B(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Sb(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Rb(1), one B(1), and one Sb(1) atom.