Rb2Na2MgTi2O6 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(3) atoms. Na(1) is bonded in a distorted see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. Ti(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form distorted edge-sharing TiO5 trigonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Rb(1), two equivalent Na(1), and two equivalent Ti(1) atoms. In the second O site, O(2) is bonded to one Rb(1), one Na(1), one Mg(1), and two equivalent Ti(1) atoms to form a mixture of distorted corner and edge-sharing ORbNaMgTi2 trigonal bipyramids. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Na(1), one Mg(1), and one Ti(1) atom.
Rb2Na2MgTi2O6 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(3) atoms. The Rb(1)-O(1) bond length is 2.84 Å. The Rb(1)-O(2) bond length is 2.85 Å. There is one shorter (2.81 Å) and one longer (2.92 Å) Rb(1)-O(3) bond length. Na(1) is bonded in a distorted see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. The Na(1)-O(2) bond length is 2.31 Å. The Na(1)-O(3) bond length is 2.43 Å. There is one shorter (2.46 Å) and one longer (2.78 Å) Na(1)-O(1) bond length. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. Both Mg(1)-O(2) bond lengths are 2.06 Å. Both Mg(1)-O(3) bond lengths are 2.00 Å. Ti(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form distorted edge-sharing TiO5 trigonal bipyramids. The Ti(1)-O(3) bond length is 1.90 Å. There is one shorter (1.95 Å) and one longer (2.04 Å) Ti(1)-O(1) bond length. There is one shorter (1.96 Å) and one longer (2.14 Å) Ti(1)-O(2) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Rb(1), two equivalent Na(1), and two equivalent Ti(1) atoms. In the second O site, O(2) is bonded to one Rb(1), one Na(1), one Mg(1), and two equivalent Ti(1) atoms to form a mixture of distorted corner and edge-sharing ORbNaMgTi2 trigonal bipyramids. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Na(1), one Mg(1), and one Ti(1) atom.