MgZn2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to three equivalent Mg(1), four equivalent Zn(2), and five equivalent Zn(1) atoms to form distorted MgMg3Zn9 cuboctahedra that share corners with six equivalent Mg(1)Mg3Zn9 cuboctahedra, corners with six equivalent Zn(1)Mg5Zn7 cuboctahedra, edges with four equivalent Mg(1)Mg3Zn9 cuboctahedra, edges with five equivalent Zn(1)Mg5Zn7 cuboctahedra, faces with six equivalent Mg(1)Mg3Zn9 cuboctahedra, and faces with eight equivalent Zn(1)Mg5Zn7 cuboctahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to five equivalent Mg(1), three equivalent Zn(2), and four equivalent Zn(1) atoms to form distorted ZnMg5Zn7 cuboctahedra that share corners with six equivalent Mg(1)Mg3Zn9 cuboctahedra, corners with six equivalent Zn(1)Mg5Zn7 cuboctahedra, edges with five equivalent Mg(1)Mg3Zn9 cuboctahedra, edges with six equivalent Zn(1)Mg5Zn7 cuboctahedra, faces with five equivalent Zn(1)Mg5Zn7 cuboctahedra, and faces with eight equivalent Mg(1)Mg3Zn9 cuboctahedra. In the second Zn site, Zn(2) is bonded in a 12-coordinate geometry to four equivalent Mg(1), three equivalent Zn(1), and five equivalent Zn(2) atoms.
MgZn2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to three equivalent Mg(1), four equivalent Zn(2), and five equivalent Zn(1) atoms to form distorted MgMg3Zn9 cuboctahedra that share corners with six equivalent Mg(1)Mg3Zn9 cuboctahedra, corners with six equivalent Zn(1)Mg5Zn7 cuboctahedra, edges with four equivalent Mg(1)Mg3Zn9 cuboctahedra, edges with five equivalent Zn(1)Mg5Zn7 cuboctahedra, faces with six equivalent Mg(1)Mg3Zn9 cuboctahedra, and faces with eight equivalent Zn(1)Mg5Zn7 cuboctahedra. There is one shorter (2.91 Å) and two longer (2.95 Å) Mg(1)-Mg(1) bond lengths. There are two shorter (2.84 Å) and two longer (2.87 Å) Mg(1)-Zn(2) bond lengths. There are a spread of Mg(1)-Zn(1) bond distances ranging from 2.87-2.95 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to five equivalent Mg(1), three equivalent Zn(2), and four equivalent Zn(1) atoms to form distorted ZnMg5Zn7 cuboctahedra that share corners with six equivalent Mg(1)Mg3Zn9 cuboctahedra, corners with six equivalent Zn(1)Mg5Zn7 cuboctahedra, edges with five equivalent Mg(1)Mg3Zn9 cuboctahedra, edges with six equivalent Zn(1)Mg5Zn7 cuboctahedra, faces with five equivalent Zn(1)Mg5Zn7 cuboctahedra, and faces with eight equivalent Mg(1)Mg3Zn9 cuboctahedra. There is one shorter (2.76 Å) and two longer (2.78 Å) Zn(1)-Zn(2) bond lengths. There are two shorter (2.84 Å) and two longer (2.95 Å) Zn(1)-Zn(1) bond lengths. In the second Zn site, Zn(2) is bonded in a 12-coordinate geometry to four equivalent Mg(1), three equivalent Zn(1), and five equivalent Zn(2) atoms. There are a spread of Zn(2)-Zn(2) bond distances ranging from 2.75-3.06 Å.