SrMg6W crystallizes in the tetragonal P4/mmm space group. Sr(1) is bonded to four equivalent Mg(1) and eight equivalent Mg(2) atoms to form SrMg12 cuboctahedra that share corners with four equivalent Sr(1)Mg12 cuboctahedra, corners with eight equivalent W(1)Mg12 cuboctahedra, edges with eight equivalent Mg(1)Sr2Mg8W2 cuboctahedra, faces with two equivalent Sr(1)Mg12 cuboctahedra, faces with four equivalent Mg(1)Sr2Mg8W2 cuboctahedra, and faces with four equivalent W(1)Mg12 cuboctahedra. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Sr(1), eight equivalent Mg(2), and two equivalent W(1) atoms to form distorted MgSr2Mg8W2 cuboctahedra that share corners with twelve equivalent Mg(1)Sr2Mg8W2 cuboctahedra, edges with four equivalent Sr(1)Mg12 cuboctahedra, edges with four equivalent W(1)Mg12 cuboctahedra, faces with two equivalent Sr(1)Mg12 cuboctahedra, faces with two equivalent W(1)Mg12 cuboctahedra, and faces with six equivalent Mg(1)Sr2Mg8W2 cuboctahedra. In the second Mg site, Mg(2) is bonded in a 2-coordinate geometry to two equivalent Sr(1), four equivalent Mg(1), and two equivalent W(1) atoms. W(1) is bonded to four equivalent Mg(1) and eight equivalent Mg(2) atoms to form WMg12 cuboctahedra that share corners with four equivalent W(1)Mg12 cuboctahedra, corners with eight equivalent Sr(1)Mg12 cuboctahedra, edges with eight equivalent Mg(1)Sr2Mg8W2 cuboctahedra, faces with two equivalent W(1)Mg12 cuboctahedra, faces with four equivalent Sr(1)Mg12 cuboctahedra, and faces with four equivalent Mg(1)Sr2Mg8W2 cuboctahedra.
SrMg6W crystallizes in the tetragonal P4/mmm space group. Sr(1) is bonded to four equivalent Mg(1) and eight equivalent Mg(2) atoms to form SrMg12 cuboctahedra that share corners with four equivalent Sr(1)Mg12 cuboctahedra, corners with eight equivalent W(1)Mg12 cuboctahedra, edges with eight equivalent Mg(1)Sr2Mg8W2 cuboctahedra, faces with two equivalent Sr(1)Mg12 cuboctahedra, faces with four equivalent Mg(1)Sr2Mg8W2 cuboctahedra, and faces with four equivalent W(1)Mg12 cuboctahedra. All Sr(1)-Mg(1) bond lengths are 3.24 Å. All Sr(1)-Mg(2) bond lengths are 3.41 Å. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Sr(1), eight equivalent Mg(2), and two equivalent W(1) atoms to form distorted MgSr2Mg8W2 cuboctahedra that share corners with twelve equivalent Mg(1)Sr2Mg8W2 cuboctahedra, edges with four equivalent Sr(1)Mg12 cuboctahedra, edges with four equivalent W(1)Mg12 cuboctahedra, faces with two equivalent Sr(1)Mg12 cuboctahedra, faces with two equivalent W(1)Mg12 cuboctahedra, and faces with six equivalent Mg(1)Sr2Mg8W2 cuboctahedra. All Mg(1)-Mg(2) bond lengths are 3.20 Å. Both Mg(1)-W(1) bond lengths are 3.24 Å. In the second Mg site, Mg(2) is bonded in a 2-coordinate geometry to two equivalent Sr(1), four equivalent Mg(1), and two equivalent W(1) atoms. Both Mg(2)-W(1) bond lengths are 2.98 Å. W(1) is bonded to four equivalent Mg(1) and eight equivalent Mg(2) atoms to form WMg12 cuboctahedra that share corners with four equivalent W(1)Mg12 cuboctahedra, corners with eight equivalent Sr(1)Mg12 cuboctahedra, edges with eight equivalent Mg(1)Sr2Mg8W2 cuboctahedra, faces with two equivalent W(1)Mg12 cuboctahedra, faces with four equivalent Sr(1)Mg12 cuboctahedra, and faces with four equivalent Mg(1)Sr2Mg8W2 cuboctahedra.