LaMg3 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 La(1) atoms to form MgLa4Mg8 cuboctahedra that share corners with twelve equivalent Mg(1)La4Mg8 cuboctahedra, edges with eight equivalent La(1)Mg12 cuboctahedra, edges with sixteen equivalent Mg(1)La4Mg8 cuboctahedra, faces with four equivalent La(1)Mg12 cuboctahedra, and faces with fourteen equivalent Mg(1)La4Mg8 cuboctahedra. La(1) is bonded to twelve equivalent Mg(1) atoms to form LaMg12 cuboctahedra that share corners with twelve equivalent La(1)Mg12 cuboctahedra, edges with twenty-four equivalent Mg(1)La4Mg8 cuboctahedra, faces with six equivalent La(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(1)La4Mg8 cuboctahedra.
LaMg3 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 La(1) atoms to form MgLa4Mg8 cuboctahedra that share corners with twelve equivalent Mg(1)La4Mg8 cuboctahedra, edges with eight equivalent La(1)Mg12 cuboctahedra, edges with sixteen equivalent Mg(1)La4Mg8 cuboctahedra, faces with four equivalent La(1)Mg12 cuboctahedra, and faces with fourteen equivalent Mg(1)La4Mg8 cuboctahedra. All Mg(1)-Mg(1) bond lengths are 3.41 Å. All Mg(1)-La(1) bond lengths are 3.41 Å. La(1) is bonded to twelve equivalent Mg(1) atoms to form LaMg12 cuboctahedra that share corners with twelve equivalent La(1)Mg12 cuboctahedra, edges with twenty-four equivalent Mg(1)La4Mg8 cuboctahedra, faces with six equivalent La(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(1)La4Mg8 cuboctahedra.