Mg2Zn crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to seven equivalent Mg(1) and five equivalent Zn(1) atoms to form distorted MgMg7Zn5 cuboctahedra that share corners with nine equivalent Mg(1)Mg7Zn5 cuboctahedra, corners with nine equivalent Zn(1)Mg10Zn2 cuboctahedra, edges with four equivalent Zn(1)Mg10Zn2 cuboctahedra, edges with fourteen equivalent Mg(1)Mg7Zn5 cuboctahedra, faces with seven equivalent Zn(1)Mg10Zn2 cuboctahedra, and faces with thirteen equivalent Mg(1)Mg7Zn5 cuboctahedra. Zn(1) is bonded to ten equivalent Mg(1) and two equivalent Zn(1) atoms to form distorted ZnMg10Zn2 cuboctahedra that share corners with eighteen equivalent Mg(1)Mg7Zn5 cuboctahedra, edges with eight equivalent Mg(1)Mg7Zn5 cuboctahedra, edges with ten equivalent Zn(1)Mg10Zn2 cuboctahedra, faces with six equivalent Zn(1)Mg10Zn2 cuboctahedra, and faces with fourteen equivalent Mg(1)Mg7Zn5 cuboctahedra.
Mg2Zn crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to seven equivalent Mg(1) and five equivalent Zn(1) atoms to form distorted MgMg7Zn5 cuboctahedra that share corners with nine equivalent Mg(1)Mg7Zn5 cuboctahedra, corners with nine equivalent Zn(1)Mg10Zn2 cuboctahedra, edges with four equivalent Zn(1)Mg10Zn2 cuboctahedra, edges with fourteen equivalent Mg(1)Mg7Zn5 cuboctahedra, faces with seven equivalent Zn(1)Mg10Zn2 cuboctahedra, and faces with thirteen equivalent Mg(1)Mg7Zn5 cuboctahedra. There are a spread of Mg(1)-Mg(1) bond distances ranging from 2.95-3.09 Å. There are a spread of Mg(1)-Zn(1) bond distances ranging from 2.82-3.28 Å. Zn(1) is bonded to ten equivalent Mg(1) and two equivalent Zn(1) atoms to form distorted ZnMg10Zn2 cuboctahedra that share corners with eighteen equivalent Mg(1)Mg7Zn5 cuboctahedra, edges with eight equivalent Mg(1)Mg7Zn5 cuboctahedra, edges with ten equivalent Zn(1)Mg10Zn2 cuboctahedra, faces with six equivalent Zn(1)Mg10Zn2 cuboctahedra, and faces with fourteen equivalent Mg(1)Mg7Zn5 cuboctahedra. Both Zn(1)-Zn(1) bond lengths are 2.95 Å.