Rb3SbO3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Rb site, Rb(2) is bonded in a 3-coordinate geometry to one O(3) and two equivalent O(2) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. Sb(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(3), and one Sb(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), and one Sb(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Rb(2), two equivalent Rb(1), two equivalent Rb(3), and one Sb(1) atom.
Rb3SbO3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. The Rb(1)-O(2) bond length is 2.83 Å. There is one shorter (2.78 Å) and one longer (2.93 Å) Rb(1)-O(1) bond length. There is one shorter (3.13 Å) and one longer (3.23 Å) Rb(1)-O(3) bond length. In the second Rb site, Rb(2) is bonded in a 3-coordinate geometry to one O(3) and two equivalent O(2) atoms. The Rb(2)-O(3) bond length is 2.88 Å. There is one shorter (2.80 Å) and one longer (3.32 Å) Rb(2)-O(2) bond length. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. The Rb(3)-O(2) bond length is 2.76 Å. There is one shorter (2.93 Å) and one longer (3.02 Å) Rb(3)-O(1) bond length. There is one shorter (2.94 Å) and one longer (3.05 Å) Rb(3)-O(3) bond length. Sb(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. The Sb(1)-O(1) bond length is 1.98 Å. The Sb(1)-O(2) bond length is 1.98 Å. The Sb(1)-O(3) bond length is 1.99 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(3), and one Sb(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), and one Sb(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Rb(2), two equivalent Rb(1), two equivalent Rb(3), and one Sb(1) atom.