CsRbMg14 crystallizes in the hexagonal P-6m2 space group. Cs(1) is bonded to six equivalent Mg(2) and six equivalent Mg(3) atoms to form CsMg12 cuboctahedra that share corners with six equivalent Cs(1)Mg12 cuboctahedra and faces with two equivalent Rb(1)Mg12 cuboctahedra. Rb(1) is bonded to six equivalent Mg(1) and six equivalent Mg(3) atoms to form RbMg12 cuboctahedra that share corners with six equivalent Rb(1)Mg12 cuboctahedra and faces with two equivalent Cs(1)Mg12 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), two equivalent Mg(4), and four equivalent Mg(3) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Cs(1), two equivalent Mg(2), two equivalent Mg(4), and four equivalent Mg(3) atoms. In the third Mg site, Mg(3) is bonded in a 8-coordinate geometry to one Cs(1), one Rb(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. In the fourth Mg site, Mg(4) is bonded in a 12-coordinate geometry to three equivalent Mg(1), three equivalent Mg(2), and six equivalent Mg(3) atoms.
CsRbMg14 crystallizes in the hexagonal P-6m2 space group. Cs(1) is bonded to six equivalent Mg(2) and six equivalent Mg(3) atoms to form CsMg12 cuboctahedra that share corners with six equivalent Cs(1)Mg12 cuboctahedra and faces with two equivalent Rb(1)Mg12 cuboctahedra. All Cs(1)-Mg(2) bond lengths are 3.53 Å. All Cs(1)-Mg(3) bond lengths are 3.52 Å. Rb(1) is bonded to six equivalent Mg(1) and six equivalent Mg(3) atoms to form RbMg12 cuboctahedra that share corners with six equivalent Rb(1)Mg12 cuboctahedra and faces with two equivalent Cs(1)Mg12 cuboctahedra. All Rb(1)-Mg(1) bond lengths are 3.53 Å. All Rb(1)-Mg(3) bond lengths are 3.47 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), two equivalent Mg(4), and four equivalent Mg(3) atoms. Both Mg(1)-Mg(1) bond lengths are 3.46 Å. Both Mg(1)-Mg(4) bond lengths are 3.36 Å. All Mg(1)-Mg(3) bond lengths are 3.22 Å. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Cs(1), two equivalent Mg(2), two equivalent Mg(4), and four equivalent Mg(3) atoms. Both Mg(2)-Mg(2) bond lengths are 3.45 Å. Both Mg(2)-Mg(4) bond lengths are 3.36 Å. All Mg(2)-Mg(3) bond lengths are 3.27 Å. In the third Mg site, Mg(3) is bonded in a 8-coordinate geometry to one Cs(1), one Rb(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. Both Mg(3)-Mg(3) bond lengths are 3.07 Å. Both Mg(3)-Mg(4) bond lengths are 3.54 Å. In the fourth Mg site, Mg(4) is bonded in a 12-coordinate geometry to three equivalent Mg(1), three equivalent Mg(2), and six equivalent Mg(3) atoms.