Mg2Cd is Molybdenite structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to nine equivalent Mg(1) and three equivalent Cd(1) atoms to form distorted MgMg9Cd3 cuboctahedra that share corners with six equivalent Cd(1)Mg6Cd6 cuboctahedra, corners with twelve equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with six equivalent Cd(1)Mg6Cd6 cuboctahedra, edges with twelve equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with seven equivalent Cd(1)Mg6Cd6 cuboctahedra, and faces with thirteen equivalent Mg(1)Mg9Cd3 cuboctahedra. Cd(1) is bonded to six equivalent Mg(1) and six equivalent Cd(1) atoms to form distorted CdMg6Cd6 cuboctahedra that share corners with six equivalent Cd(1)Mg6Cd6 cuboctahedra, corners with twelve equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with six equivalent Cd(1)Mg6Cd6 cuboctahedra, edges with twelve equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with six equivalent Cd(1)Mg6Cd6 cuboctahedra, and faces with fourteen equivalent Mg(1)Mg9Cd3 cuboctahedra.
Mg2Cd is Molybdenite structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to nine equivalent Mg(1) and three equivalent Cd(1) atoms to form distorted MgMg9Cd3 cuboctahedra that share corners with six equivalent Cd(1)Mg6Cd6 cuboctahedra, corners with twelve equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with six equivalent Cd(1)Mg6Cd6 cuboctahedra, edges with twelve equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with seven equivalent Cd(1)Mg6Cd6 cuboctahedra, and faces with thirteen equivalent Mg(1)Mg9Cd3 cuboctahedra. There are six shorter (3.17 Å) and three longer (3.20 Å) Mg(1)-Mg(1) bond lengths. All Mg(1)-Cd(1) bond lengths are 3.15 Å. Cd(1) is bonded to six equivalent Mg(1) and six equivalent Cd(1) atoms to form distorted CdMg6Cd6 cuboctahedra that share corners with six equivalent Cd(1)Mg6Cd6 cuboctahedra, corners with twelve equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with six equivalent Cd(1)Mg6Cd6 cuboctahedra, edges with twelve equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with six equivalent Cd(1)Mg6Cd6 cuboctahedra, and faces with fourteen equivalent Mg(1)Mg9Cd3 cuboctahedra. All Cd(1)-Cd(1) bond lengths are 3.17 Å.