CsSrMg14 crystallizes in the hexagonal P-6m2 space group. Cs(1) is bonded to six equivalent Mg(1) and six equivalent Mg(3) atoms to form CsMg12 cuboctahedra that share corners with six equivalent Cs(1)Mg12 cuboctahedra, faces with two equivalent Sr(1)Mg12 cuboctahedra, and faces with six equivalent Mg(4)Mg12 cuboctahedra. Sr(1) is bonded to six equivalent Mg(2) and six equivalent Mg(3) atoms to form SrMg12 cuboctahedra that share corners with six equivalent Sr(1)Mg12 cuboctahedra, faces with two equivalent Cs(1)Mg12 cuboctahedra, and faces with six equivalent Mg(4)Mg12 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 2-coordinate geometry to two equivalent Cs(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 Sr(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 10-coordinate geometry to one Cs(1), one Sr(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 to three equivalent Mg(1), three equivalent Mg(2), and six equivalent Mg(3) atoms to form distorted MgMg12 cuboctahedra that share corners with six equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with three equivalent Cs(1)Mg12 cuboctahedra, and faces with three equivalent Sr(1)Mg12 cuboctahedra.
CsSrMg14 crystallizes in the hexagonal P-6m2 space group. Cs(1) is bonded to six equivalent Mg(1) and six equivalent Mg(3) atoms to form CsMg12 cuboctahedra that share corners with six equivalent Cs(1)Mg12 cuboctahedra, faces with two equivalent Sr(1)Mg12 cuboctahedra, and faces with six equivalent Mg(4)Mg12 cuboctahedra. All Cs(1)-Mg(1) bond lengths are 3.46 Å. All Cs(1)-Mg(3) bond lengths are 3.49 Å. Sr(1) is bonded to six equivalent Mg(2) and six equivalent Mg(3) atoms to form SrMg12 cuboctahedra that share corners with six equivalent Sr(1)Mg12 cuboctahedra, faces with two equivalent Cs(1)Mg12 cuboctahedra, and faces with six equivalent Mg(4)Mg12 cuboctahedra. All Sr(1)-Mg(2) bond lengths are 3.46 Å. All Sr(1)-Mg(3) bond lengths are 3.39 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 2-coordinate geometry to two equivalent Cs(1), two equivalent Mg(4), and four equivalent Mg(3) atoms. Both Mg(1)-Mg(4) bond lengths are 3.35 Å. All Mg(1)-Mg(3) bond lengths are 3.32 Å. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Sr(1), two equivalent Mg(2), two equivalent Mg(4), and four equivalent Mg(3) atoms. Both Mg(2)-Mg(2) bond lengths are 3.36 Å. Both Mg(2)-Mg(4) bond lengths are 3.36 Å. All Mg(2)-Mg(3) bond lengths are 3.21 Å. In the third Mg site, Mg(3) is bonded in a 10-coordinate geometry to one Cs(1), one Sr(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 3.15 Å. Both Mg(3)-Mg(4) bond lengths are 3.47 Å. In the fourth Mg site, Mg(4) is bonded to three equivalent Mg(1), three equivalent Mg(2), and six equivalent Mg(3) atoms to form distorted MgMg12 cuboctahedra that share corners with six equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with three equivalent Cs(1)Mg12 cuboctahedra, and faces with three equivalent Sr(1)Mg12 cuboctahedra.