NpPm is Magnesium-derived structured and crystallizes in the hexagonal P-6m2 space group. Np(1) is bonded to six equivalent Np(1) and six equivalent Pm(1) atoms to form NpPm6Np6 cuboctahedra that share corners with eighteen equivalent Np(1)Pm6Np6 cuboctahedra, edges with six equivalent Np(1)Pm6Np6 cuboctahedra, edges with twelve equivalent Pm(1)Pm6Np6 cuboctahedra, faces with eight equivalent Np(1)Pm6Np6 cuboctahedra, and faces with twelve equivalent Pm(1)Pm6Np6 cuboctahedra. Pm(1) is bonded to six equivalent Np(1) and six equivalent Pm(1) atoms to form PmPm6Np6 cuboctahedra that share corners with eighteen equivalent Pm(1)Pm6Np6 cuboctahedra, edges with six equivalent Pm(1)Pm6Np6 cuboctahedra, edges with twelve equivalent Np(1)Pm6Np6 cuboctahedra, faces with eight equivalent Pm(1)Pm6Np6 cuboctahedra, and faces with twelve equivalent Np(1)Pm6Np6 cuboctahedra.
NpPm is Magnesium-derived structured and crystallizes in the hexagonal P-6m2 space group. Np(1) is bonded to six equivalent Np(1) and six equivalent Pm(1) atoms to form NpPm6Np6 cuboctahedra that share corners with eighteen equivalent Np(1)Pm6Np6 cuboctahedra, edges with six equivalent Np(1)Pm6Np6 cuboctahedra, edges with twelve equivalent Pm(1)Pm6Np6 cuboctahedra, faces with eight equivalent Np(1)Pm6Np6 cuboctahedra, and faces with twelve equivalent Pm(1)Pm6Np6 cuboctahedra. All Np(1)-Np(1) bond lengths are 3.37 Å. All Np(1)-Pm(1) bond lengths are 3.55 Å. Pm(1) is bonded to six equivalent Np(1) and six equivalent Pm(1) atoms to form PmPm6Np6 cuboctahedra that share corners with eighteen equivalent Pm(1)Pm6Np6 cuboctahedra, edges with six equivalent Pm(1)Pm6Np6 cuboctahedra, edges with twelve equivalent Np(1)Pm6Np6 cuboctahedra, faces with eight equivalent Pm(1)Pm6Np6 cuboctahedra, and faces with twelve equivalent Np(1)Pm6Np6 cuboctahedra. All Pm(1)-Pm(1) bond lengths are 3.37 Å.