PuSm crystallizes in the hexagonal P-6m2 space group. Pu(1) is bonded to six equivalent Pu(1) and six equivalent Sm(1) atoms to form PuSm6Pu6 cuboctahedra that share corners with eighteen equivalent Pu(1)Sm6Pu6 cuboctahedra, edges with six equivalent Pu(1)Sm6Pu6 cuboctahedra, edges with twelve equivalent Sm(1)Sm6Pu6 cuboctahedra, faces with eight equivalent Pu(1)Sm6Pu6 cuboctahedra, and faces with twelve equivalent Sm(1)Sm6Pu6 cuboctahedra. Sm(1) is bonded to six equivalent Pu(1) and six equivalent Sm(1) atoms to form SmSm6Pu6 cuboctahedra that share corners with eighteen equivalent Sm(1)Sm6Pu6 cuboctahedra, edges with six equivalent Sm(1)Sm6Pu6 cuboctahedra, edges with twelve equivalent Pu(1)Sm6Pu6 cuboctahedra, faces with eight equivalent Sm(1)Sm6Pu6 cuboctahedra, and faces with twelve equivalent Pu(1)Sm6Pu6 cuboctahedra.
PuSm crystallizes in the hexagonal P-6m2 space group. Pu(1) is bonded to six equivalent Pu(1) and six equivalent Sm(1) atoms to form PuSm6Pu6 cuboctahedra that share corners with eighteen equivalent Pu(1)Sm6Pu6 cuboctahedra, edges with six equivalent Pu(1)Sm6Pu6 cuboctahedra, edges with twelve equivalent Sm(1)Sm6Pu6 cuboctahedra, faces with eight equivalent Pu(1)Sm6Pu6 cuboctahedra, and faces with twelve equivalent Sm(1)Sm6Pu6 cuboctahedra. All Pu(1)-Pu(1) bond lengths are 3.62 Å. All Pu(1)-Sm(1) bond lengths are 3.62 Å. Sm(1) is bonded to six equivalent Pu(1) and six equivalent Sm(1) atoms to form SmSm6Pu6 cuboctahedra that share corners with eighteen equivalent Sm(1)Sm6Pu6 cuboctahedra, edges with six equivalent Sm(1)Sm6Pu6 cuboctahedra, edges with twelve equivalent Pu(1)Sm6Pu6 cuboctahedra, faces with eight equivalent Sm(1)Sm6Pu6 cuboctahedra, and faces with twelve equivalent Pu(1)Sm6Pu6 cuboctahedra. All Sm(1)-Sm(1) bond lengths are 3.62 Å.