Sm3Ga 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 Ga(1) atoms to form distorted SmSm8Ga4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8Ga4 cuboctahedra, edges with eight equivalent Ga(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Ga4 cuboctahedra, faces with four equivalent Ga(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Sm8Ga4 cuboctahedra. Ga(1) is bonded to twelve equivalent Sm(1) atoms to form GaSm12 cuboctahedra that share corners with twelve equivalent Ga(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Sm8Ga4 cuboctahedra, faces with six equivalent Ga(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Sm8Ga4 cuboctahedra.
Sm3Ga 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 Ga(1) atoms to form distorted SmSm8Ga4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8Ga4 cuboctahedra, edges with eight equivalent Ga(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Ga4 cuboctahedra, faces with four equivalent Ga(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Sm8Ga4 cuboctahedra. All Sm(1)-Sm(1) bond lengths are 3.40 Å. All Sm(1)-Ga(1) bond lengths are 3.40 Å. Ga(1) is bonded to twelve equivalent Sm(1) atoms to form GaSm12 cuboctahedra that share corners with twelve equivalent Ga(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Sm8Ga4 cuboctahedra, faces with six equivalent Ga(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Sm8Ga4 cuboctahedra.