Mg3Sc is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to eight equivalent Mg(1) and four equivalent Sc(1) atoms to form MgMg8Sc4 cuboctahedra that share corners with four equivalent Sc(1)Mg12 cuboctahedra, corners with fourteen equivalent Mg(1)Mg8Sc4 cuboctahedra, edges with six equivalent Sc(1)Mg12 cuboctahedra, edges with twelve equivalent Mg(1)Mg8Sc4 cuboctahedra, faces with four equivalent Sc(1)Mg12 cuboctahedra, and faces with sixteen equivalent Mg(1)Mg8Sc4 cuboctahedra. Sc(1) is bonded to twelve equivalent Mg(1) atoms to form ScMg12 cuboctahedra that share corners with six equivalent Sc(1)Mg12 cuboctahedra, corners with twelve equivalent Mg(1)Mg8Sc4 cuboctahedra, edges with eighteen equivalent Mg(1)Mg8Sc4 cuboctahedra, faces with eight equivalent Sc(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(1)Mg8Sc4 cuboctahedra.
Mg3Sc is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to eight equivalent Mg(1) and four equivalent Sc(1) atoms to form MgMg8Sc4 cuboctahedra that share corners with four equivalent Sc(1)Mg12 cuboctahedra, corners with fourteen equivalent Mg(1)Mg8Sc4 cuboctahedra, edges with six equivalent Sc(1)Mg12 cuboctahedra, edges with twelve equivalent Mg(1)Mg8Sc4 cuboctahedra, faces with four equivalent Sc(1)Mg12 cuboctahedra, and faces with sixteen equivalent Mg(1)Mg8Sc4 cuboctahedra. There are four shorter (3.15 Å) and four longer (3.20 Å) Mg(1)-Mg(1) bond lengths. There are two shorter (3.15 Å) and two longer (3.20 Å) Mg(1)-Sc(1) bond lengths. Sc(1) is bonded to twelve equivalent Mg(1) atoms to form ScMg12 cuboctahedra that share corners with six equivalent Sc(1)Mg12 cuboctahedra, corners with twelve equivalent Mg(1)Mg8Sc4 cuboctahedra, edges with eighteen equivalent Mg(1)Mg8Sc4 cuboctahedra, faces with eight equivalent Sc(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(1)Mg8Sc4 cuboctahedra.