Sc3Al is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Sc(1) is bonded to eight equivalent Sc(1) and four equivalent Al(1) atoms to form distorted ScSc8Al4 cuboctahedra that share corners with four equivalent Al(1)Sc12 cuboctahedra, corners with fourteen equivalent Sc(1)Sc8Al4 cuboctahedra, edges with six equivalent Al(1)Sc12 cuboctahedra, edges with twelve equivalent Sc(1)Sc8Al4 cuboctahedra, faces with four equivalent Al(1)Sc12 cuboctahedra, and faces with sixteen equivalent Sc(1)Sc8Al4 cuboctahedra. Al(1) is bonded to twelve equivalent Sc(1) atoms to form AlSc12 cuboctahedra that share corners with six equivalent Al(1)Sc12 cuboctahedra, corners with twelve equivalent Sc(1)Sc8Al4 cuboctahedra, edges with eighteen equivalent Sc(1)Sc8Al4 cuboctahedra, faces with eight equivalent Al(1)Sc12 cuboctahedra, and faces with twelve equivalent Sc(1)Sc8Al4 cuboctahedra.
Sc3Al is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Sc(1) is bonded to eight equivalent Sc(1) and four equivalent Al(1) atoms to form distorted ScSc8Al4 cuboctahedra that share corners with four equivalent Al(1)Sc12 cuboctahedra, corners with fourteen equivalent Sc(1)Sc8Al4 cuboctahedra, edges with six equivalent Al(1)Sc12 cuboctahedra, edges with twelve equivalent Sc(1)Sc8Al4 cuboctahedra, faces with four equivalent Al(1)Sc12 cuboctahedra, and faces with sixteen equivalent Sc(1)Sc8Al4 cuboctahedra. There are a spread of Sc(1)-Sc(1) bond distances ranging from 3.07-3.24 Å. There are two shorter (3.10 Å) and two longer (3.16 Å) Sc(1)-Al(1) bond lengths. Al(1) is bonded to twelve equivalent Sc(1) atoms to form AlSc12 cuboctahedra that share corners with six equivalent Al(1)Sc12 cuboctahedra, corners with twelve equivalent Sc(1)Sc8Al4 cuboctahedra, edges with eighteen equivalent Sc(1)Sc8Al4 cuboctahedra, faces with eight equivalent Al(1)Sc12 cuboctahedra, and faces with twelve equivalent Sc(1)Sc8Al4 cuboctahedra.