ScCd3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Sc(1) is bonded to twelve equivalent Cd(1) atoms to form ScCd12 cuboctahedra that share corners with six equivalent Sc(1)Cd12 cuboctahedra, corners with twelve equivalent Cd(1)Sc4Cd8 cuboctahedra, edges with eighteen equivalent Cd(1)Sc4Cd8 cuboctahedra, faces with eight equivalent Sc(1)Cd12 cuboctahedra, and faces with twelve equivalent Cd(1)Sc4Cd8 cuboctahedra. Cd(1) is bonded to four equivalent Sc(1) and eight equivalent Cd(1) atoms to form distorted CdSc4Cd8 cuboctahedra that share corners with four equivalent Sc(1)Cd12 cuboctahedra, corners with fourteen equivalent Cd(1)Sc4Cd8 cuboctahedra, edges with six equivalent Sc(1)Cd12 cuboctahedra, edges with twelve equivalent Cd(1)Sc4Cd8 cuboctahedra, faces with four equivalent Sc(1)Cd12 cuboctahedra, and faces with sixteen equivalent Cd(1)Sc4Cd8 cuboctahedra.
ScCd3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Sc(1) is bonded to twelve equivalent Cd(1) atoms to form ScCd12 cuboctahedra that share corners with six equivalent Sc(1)Cd12 cuboctahedra, corners with twelve equivalent Cd(1)Sc4Cd8 cuboctahedra, edges with eighteen equivalent Cd(1)Sc4Cd8 cuboctahedra, faces with eight equivalent Sc(1)Cd12 cuboctahedra, and faces with twelve equivalent Cd(1)Sc4Cd8 cuboctahedra. There are six shorter (3.04 Å) and six longer (3.18 Å) Sc(1)-Cd(1) bond lengths. Cd(1) is bonded to four equivalent Sc(1) and eight equivalent Cd(1) atoms to form distorted CdSc4Cd8 cuboctahedra that share corners with four equivalent Sc(1)Cd12 cuboctahedra, corners with fourteen equivalent Cd(1)Sc4Cd8 cuboctahedra, edges with six equivalent Sc(1)Cd12 cuboctahedra, edges with twelve equivalent Cd(1)Sc4Cd8 cuboctahedra, faces with four equivalent Sc(1)Cd12 cuboctahedra, and faces with sixteen equivalent Cd(1)Sc4Cd8 cuboctahedra. There are a spread of Cd(1)-Cd(1) bond distances ranging from 3.03-3.19 Å.