Mg3Ga 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 Ga(1) atoms to form distorted MgMg8Ga4 cuboctahedra that share corners with twelve equivalent Mg(1)Mg8Ga4 cuboctahedra, edges with eight equivalent Ga(1)Mg12 cuboctahedra, edges with sixteen equivalent Mg(1)Mg8Ga4 cuboctahedra, faces with four equivalent Ga(1)Mg12 cuboctahedra, and faces with fourteen equivalent Mg(1)Mg8Ga4 cuboctahedra. Ga(1) is bonded to twelve equivalent Mg(1) atoms to form GaMg12 cuboctahedra that share corners with twelve equivalent Ga(1)Mg12 cuboctahedra, edges with twenty-four equivalent Mg(1)Mg8Ga4 cuboctahedra, faces with six equivalent Ga(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(1)Mg8Ga4 cuboctahedra.
Mg3Ga 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 Ga(1) atoms to form distorted MgMg8Ga4 cuboctahedra that share corners with twelve equivalent Mg(1)Mg8Ga4 cuboctahedra, edges with eight equivalent Ga(1)Mg12 cuboctahedra, edges with sixteen equivalent Mg(1)Mg8Ga4 cuboctahedra, faces with four equivalent Ga(1)Mg12 cuboctahedra, and faces with fourteen equivalent Mg(1)Mg8Ga4 cuboctahedra. All Mg(1)-Mg(1) bond lengths are 3.04 Å. All Mg(1)-Ga(1) bond lengths are 3.04 Å. Ga(1) is bonded to twelve equivalent Mg(1) atoms to form GaMg12 cuboctahedra that share corners with twelve equivalent Ga(1)Mg12 cuboctahedra, edges with twenty-four equivalent Mg(1)Mg8Ga4 cuboctahedra, faces with six equivalent Ga(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(1)Mg8Ga4 cuboctahedra.