Rb2MgCr2O14 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and two equivalent O(7) atoms. Mg(1) is bonded in an octahedral geometry to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(4), and one O(7) atom. There are seven inequivalent O sites. In the first O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one Cr(1) atom. In the second O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Rb(1) and one Cr(1) atom. In the third O site, O(2) is bonded in a single-bond geometry to one Rb(1) and one Cr(1) atom. In the fourth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Rb(1), one Mg(1), and one O(5) atom. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), one Cr(1), and one O(6) atom. In the sixth O site, O(5) is bonded in a 3-coordinate geometry to one Rb(1), one Mg(1), and one O(3) atom. In the seventh O site, O(6) is bonded in a distorted single-bond geometry to one Mg(1) and one O(4) atom.
Rb2MgCr2O14 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and two equivalent O(7) atoms. The Rb(1)-O(1) bond length is 2.86 Å. The Rb(1)-O(2) bond length is 3.17 Å. The Rb(1)-O(3) bond length is 3.15 Å. The Rb(1)-O(4) bond length is 3.37 Å. The Rb(1)-O(5) bond length is 2.88 Å. There is one shorter (2.86 Å) and one longer (2.87 Å) Rb(1)-O(7) bond length. Mg(1) is bonded in an octahedral geometry to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms. Both Mg(1)-O(3) bond lengths are 2.23 Å. Both Mg(1)-O(5) bond lengths are 2.07 Å. Both Mg(1)-O(6) bond lengths are 2.00 Å. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(4), and one O(7) atom. The Cr(1)-O(1) bond length is 1.62 Å. The Cr(1)-O(2) bond length is 1.64 Å. The Cr(1)-O(4) bond length is 1.89 Å. The Cr(1)-O(7) bond length is 1.64 Å. There are seven inequivalent O sites. In the first O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one Cr(1) atom. In the second O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Rb(1) and one Cr(1) atom. In the third O site, O(2) is bonded in a single-bond geometry to one Rb(1) and one Cr(1) atom. In the fourth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Rb(1), one Mg(1), and one O(5) atom. The O(3)-O(5) bond length is 1.32 Å. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), one Cr(1), and one O(6) atom. The O(4)-O(6) bond length is 1.35 Å. In the sixth O site, O(5) is bonded in a 3-coordinate geometry to one Rb(1), one Mg(1), and one O(3) atom. In the seventh O site, O(6) is bonded in a distorted single-bond geometry to one Mg(1) and one O(4) atom.