RbMgRuO3 crystallizes in the monoclinic Cm space group. Rb(1) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. Mg(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. Ru(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent Ru(1) atoms. In the second O site, O(2) is bonded to four equivalent Rb(1), one Mg(1), and one Ru(1) atom to form a mixture of distorted edge and corner-sharing ORb4MgRu octahedra. The corner-sharing octahedral tilt angles are 2°.
RbMgRuO3 crystallizes in the monoclinic Cm space group. Rb(1) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. There is one shorter (2.81 Å) and three longer (2.85 Å) Rb(1)-O(2) bond lengths. Mg(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. The Mg(1)-O(2) bond length is 1.98 Å. There are two shorter (2.11 Å) and two longer (2.13 Å) Mg(1)-O(1) bond lengths. Ru(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. The Ru(1)-O(2) bond length is 1.96 Å. There are two shorter (2.09 Å) and two longer (2.11 Å) Ru(1)-O(1) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent Ru(1) atoms. In the second O site, O(2) is bonded to four equivalent Rb(1), one Mg(1), and one Ru(1) atom to form a mixture of distorted edge and corner-sharing ORb4MgRu octahedra. The corner-sharing octahedral tilt angles are 2°.