RbMgSbO3 crystallizes in the tetragonal P4/mmm space group. Rb(1) is bonded to two equivalent Mg(1) and four equivalent O(2) atoms to form RbMg2O4 octahedra that share corners with six equivalent Rb(1)Mg2O4 octahedra, corners with eight equivalent Sb(1)O6 octahedra, and edges with four equivalent Rb(1)Mg2O4 octahedra. The corner-sharing octahedral tilt angles range from 0-90°. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent Rb(1) and four equivalent O(1) atoms. Sb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted SbO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra and corners with eight equivalent Rb(1)Mg2O4 octahedra. The corner-sharing octahedral tilt angles range from 0-90°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Mg(1) and two equivalent Sb(1) atoms. In the second O site, O(2) is bonded to four equivalent Rb(1) and two equivalent Sb(1) atoms to form a mixture of corner and edge-sharing ORb4Sb2 octahedra. The corner-sharing octahedra are not tilted.
RbMgSbO3 crystallizes in the tetragonal P4/mmm space group. Rb(1) is bonded to two equivalent Mg(1) and four equivalent O(2) atoms to form RbMg2O4 octahedra that share corners with six equivalent Rb(1)Mg2O4 octahedra, corners with eight equivalent Sb(1)O6 octahedra, and edges with four equivalent Rb(1)Mg2O4 octahedra. The corner-sharing octahedral tilt angles range from 0-90°. Both Rb(1)-Mg(1) bond lengths are 2.74 Å. All Rb(1)-O(2) bond lengths are 3.09 Å. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent Rb(1) and four equivalent O(1) atoms. All Mg(1)-O(1) bond lengths are 2.18 Å. Sb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted SbO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra and corners with eight equivalent Rb(1)Mg2O4 octahedra. The corner-sharing octahedral tilt angles range from 0-90°. Both Sb(1)-O(2) bond lengths are 2.74 Å. All Sb(1)-O(1) bond lengths are 2.18 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Mg(1) and two equivalent Sb(1) atoms. In the second O site, O(2) is bonded to four equivalent Rb(1) and two equivalent Sb(1) atoms to form a mixture of corner and edge-sharing ORb4Sb2 octahedra. The corner-sharing octahedra are not tilted.