Mg3Hf is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Mg(1) is bonded to eight equivalent Mg(1) and four equivalent Hf(1) atoms to form MgHf4Mg8 cuboctahedra that share corners with twelve equivalent Mg(1)Hf4Mg8 cuboctahedra, edges with eight equivalent Hf(1)Mg12 cuboctahedra, edges with sixteen equivalent Mg(1)Hf4Mg8 cuboctahedra, faces with four equivalent Hf(1)Mg12 cuboctahedra, and faces with fourteen equivalent Mg(1)Hf4Mg8 cuboctahedra. Hf(1) is bonded to twelve equivalent Mg(1) atoms to form HfMg12 cuboctahedra that share corners with twelve equivalent Hf(1)Mg12 cuboctahedra, edges with twenty-four equivalent Mg(1)Hf4Mg8 cuboctahedra, faces with six equivalent Hf(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(1)Hf4Mg8 cuboctahedra.
Mg3Hf is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Mg(1) is bonded to eight equivalent Mg(1) and four equivalent Hf(1) atoms to form MgHf4Mg8 cuboctahedra that share corners with twelve equivalent Mg(1)Hf4Mg8 cuboctahedra, edges with eight equivalent Hf(1)Mg12 cuboctahedra, edges with sixteen equivalent Mg(1)Hf4Mg8 cuboctahedra, faces with four equivalent Hf(1)Mg12 cuboctahedra, and faces with fourteen equivalent Mg(1)Hf4Mg8 cuboctahedra. All Mg(1)-Mg(1) bond lengths are 3.13 Å. All Mg(1)-Hf(1) bond lengths are 3.13 Å. Hf(1) is bonded to twelve equivalent Mg(1) atoms to form HfMg12 cuboctahedra that share corners with twelve equivalent Hf(1)Mg12 cuboctahedra, edges with twenty-four equivalent Mg(1)Hf4Mg8 cuboctahedra, faces with six equivalent Hf(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(1)Hf4Mg8 cuboctahedra.