CsSrMg6 crystallizes in the orthorhombic Amm2 space group. Cs(1) is bonded to two equivalent Sr(1), two equivalent Mg(3), four equivalent Mg(1), and four equivalent Mg(2) atoms to form distorted CsSr2Mg10 cuboctahedra that share corners with four equivalent Sr(1)Cs2Mg10 cuboctahedra, corners with six equivalent Cs(1)Sr2Mg10 cuboctahedra, edges with two equivalent Sr(1)Cs2Mg10 cuboctahedra, faces with two equivalent Cs(1)Sr2Mg10 cuboctahedra, and faces with two equivalent Sr(1)Cs2Mg10 cuboctahedra. Sr(1) is bonded to two equivalent Cs(1), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(2) atoms to form distorted SrCs2Mg10 cuboctahedra that share corners with four equivalent Cs(1)Sr2Mg10 cuboctahedra, corners with six equivalent Sr(1)Cs2Mg10 cuboctahedra, edges with two equivalent Cs(1)Sr2Mg10 cuboctahedra, faces with two equivalent Cs(1)Sr2Mg10 cuboctahedra, and faces with two equivalent Sr(1)Cs2Mg10 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Cs(1), two equivalent Sr(1), one Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. In the second Mg site, Mg(2) is bonded in a 9-coordinate geometry to two equivalent Cs(1), two equivalent Sr(1), one Mg(2), one Mg(3), one Mg(4), and two equivalent Mg(1) atoms. In the third Mg site, Mg(3) is bonded in a 8-coordinate geometry to two equivalent Cs(1), two equivalent Mg(2), and four equivalent Mg(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 8-coordinate geometry to two equivalent Sr(1), two equivalent Mg(2), and four equivalent Mg(1) atoms.
CsSrMg6 crystallizes in the orthorhombic Amm2 space group. Cs(1) is bonded to two equivalent Sr(1), two equivalent Mg(3), four equivalent Mg(1), and four equivalent Mg(2) atoms to form distorted CsSr2Mg10 cuboctahedra that share corners with four equivalent Sr(1)Cs2Mg10 cuboctahedra, corners with six equivalent Cs(1)Sr2Mg10 cuboctahedra, edges with two equivalent Sr(1)Cs2Mg10 cuboctahedra, faces with two equivalent Cs(1)Sr2Mg10 cuboctahedra, and faces with two equivalent Sr(1)Cs2Mg10 cuboctahedra. Both Cs(1)-Sr(1) bond lengths are 3.62 Å. Both Cs(1)-Mg(3) bond lengths are 3.70 Å. There are two shorter (3.91 Å) and two longer (4.03 Å) Cs(1)-Mg(1) bond lengths. All Cs(1)-Mg(2) bond lengths are 3.78 Å. Sr(1) is bonded to two equivalent Cs(1), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(2) atoms to form distorted SrCs2Mg10 cuboctahedra that share corners with four equivalent Cs(1)Sr2Mg10 cuboctahedra, corners with six equivalent Sr(1)Cs2Mg10 cuboctahedra, edges with two equivalent Cs(1)Sr2Mg10 cuboctahedra, faces with two equivalent Cs(1)Sr2Mg10 cuboctahedra, and faces with two equivalent Sr(1)Cs2Mg10 cuboctahedra. Both Sr(1)-Mg(4) bond lengths are 3.72 Å. There are two shorter (3.96 Å) and two longer (3.98 Å) Sr(1)-Mg(1) bond lengths. All Sr(1)-Mg(2) bond lengths are 3.61 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Cs(1), two equivalent Sr(1), one Mg(1), two equivalent Mg(2), two equivalent Mg(3), and two equivalent Mg(4) atoms. The Mg(1)-Mg(1) bond length is 3.52 Å. Both Mg(1)-Mg(2) bond lengths are 3.10 Å. Both Mg(1)-Mg(3) bond lengths are 3.31 Å. Both Mg(1)-Mg(4) bond lengths are 3.28 Å. In the second Mg site, Mg(2) is bonded in a 9-coordinate geometry to two equivalent Cs(1), two equivalent Sr(1), one Mg(2), one Mg(3), one Mg(4), and two equivalent Mg(1) atoms. The Mg(2)-Mg(2) bond length is 3.39 Å. The Mg(2)-Mg(3) bond length is 3.02 Å. The Mg(2)-Mg(4) bond length is 3.22 Å. In the third Mg site, Mg(3) is bonded in a 8-coordinate geometry to two equivalent Cs(1), two equivalent Mg(2), and four equivalent Mg(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 8-coordinate geometry to two equivalent Sr(1), two equivalent Mg(2), and four equivalent Mg(1) atoms.