LaMg3 is Uranium Silicide structured and crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent Mg(1), four equivalent Mg(2), and four equivalent La(1) atoms to form MgLa4Mg8 cuboctahedra that share corners with twelve equivalent Mg(1)La4Mg8 cuboctahedra, edges with eight equivalent Mg(1)La4Mg8 cuboctahedra, edges with eight equivalent Mg(2)La4Mg8 cuboctahedra, edges with eight equivalent La(1)Mg12 cuboctahedra, faces with four equivalent Mg(2)La4Mg8 cuboctahedra, faces with four equivalent La(1)Mg12 cuboctahedra, and faces with ten equivalent Mg(1)La4Mg8 cuboctahedra. In the second Mg site, Mg(2) is bonded to eight equivalent Mg(1) and four equivalent La(1) atoms to form distorted MgLa4Mg8 cuboctahedra that share corners with twelve equivalent Mg(2)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, faces with six equivalent Mg(2)La4Mg8 cuboctahedra, and faces with eight equivalent Mg(1)La4Mg8 cuboctahedra. La(1) is bonded to four equivalent Mg(2) and eight equivalent Mg(1) atoms to form LaMg12 cuboctahedra that share corners with twelve equivalent La(1)Mg12 cuboctahedra, edges with eight equivalent Mg(2)La4Mg8 cuboctahedra, edges with sixteen equivalent Mg(1)La4Mg8 cuboctahedra, faces with four equivalent Mg(2)La4Mg8 cuboctahedra, faces with six equivalent La(1)Mg12 cuboctahedra, and faces with eight equivalent Mg(1)La4Mg8 cuboctahedra.
LaMg3 is Uranium Silicide structured and crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent Mg(1), four equivalent Mg(2), and four equivalent La(1) atoms to form MgLa4Mg8 cuboctahedra that share corners with twelve equivalent Mg(1)La4Mg8 cuboctahedra, edges with eight equivalent Mg(1)La4Mg8 cuboctahedra, edges with eight equivalent Mg(2)La4Mg8 cuboctahedra, edges with eight equivalent La(1)Mg12 cuboctahedra, faces with four equivalent Mg(2)La4Mg8 cuboctahedra, faces with four equivalent La(1)Mg12 cuboctahedra, and faces with ten equivalent Mg(1)La4Mg8 cuboctahedra. All Mg(1)-Mg(1) bond lengths are 3.36 Å. All Mg(1)-Mg(2) bond lengths are 3.44 Å. All Mg(1)-La(1) bond lengths are 3.44 Å. In the second Mg site, Mg(2) is bonded to eight equivalent Mg(1) and four equivalent La(1) atoms to form distorted MgLa4Mg8 cuboctahedra that share corners with twelve equivalent Mg(2)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, faces with six equivalent Mg(2)La4Mg8 cuboctahedra, and faces with eight equivalent Mg(1)La4Mg8 cuboctahedra. All Mg(2)-La(1) bond lengths are 3.36 Å. La(1) is bonded to four equivalent Mg(2) and eight equivalent Mg(1) atoms to form LaMg12 cuboctahedra that share corners with twelve equivalent La(1)Mg12 cuboctahedra, edges with eight equivalent Mg(2)La4Mg8 cuboctahedra, edges with sixteen equivalent Mg(1)La4Mg8 cuboctahedra, faces with four equivalent Mg(2)La4Mg8 cuboctahedra, faces with six equivalent La(1)Mg12 cuboctahedra, and faces with eight equivalent Mg(1)La4Mg8 cuboctahedra.