Sm3Ce is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Sm(1) is bonded to eight equivalent Sm(1) and four equivalent Ce(1) atoms to form SmCe4Sm8 cuboctahedra that share corners with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra, edges with eight equivalent Ce(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with four equivalent Ce(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Ce4Sm8 cuboctahedra. Ce(1) is bonded to twelve equivalent Sm(1) atoms to form CeSm12 cuboctahedra that share corners with twelve equivalent Ce(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with six equivalent Ce(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra.
Sm3Ce is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Sm(1) is bonded to eight equivalent Sm(1) and four equivalent Ce(1) atoms to form SmCe4Sm8 cuboctahedra that share corners with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra, edges with eight equivalent Ce(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with four equivalent Ce(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Ce4Sm8 cuboctahedra. All Sm(1)-Sm(1) bond lengths are 3.59 Å. All Sm(1)-Ce(1) bond lengths are 3.59 Å. Ce(1) is bonded to twelve equivalent Sm(1) atoms to form CeSm12 cuboctahedra that share corners with twelve equivalent Ce(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with six equivalent Ce(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra.