Sm3In 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 In(1) atoms to form distorted SmSm8In4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8In4 cuboctahedra, edges with eight equivalent In(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8In4 cuboctahedra, faces with four equivalent In(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Sm8In4 cuboctahedra. In(1) is bonded to twelve equivalent Sm(1) atoms to form InSm12 cuboctahedra that share corners with twelve equivalent In(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Sm8In4 cuboctahedra, faces with six equivalent In(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Sm8In4 cuboctahedra.
Sm3In 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 In(1) atoms to form distorted SmSm8In4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8In4 cuboctahedra, edges with eight equivalent In(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8In4 cuboctahedra, faces with four equivalent In(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Sm8In4 cuboctahedra. All Sm(1)-Sm(1) bond lengths are 3.48 Å. All Sm(1)-In(1) bond lengths are 3.48 Å. In(1) is bonded to twelve equivalent Sm(1) atoms to form InSm12 cuboctahedra that share corners with twelve equivalent In(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Sm8In4 cuboctahedra, faces with six equivalent In(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Sm8In4 cuboctahedra.