SmNd3 is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to twelve equivalent Nd(1) atoms to form SmNd12 cuboctahedra that share corners with six equivalent Sm(1)Nd12 cuboctahedra, corners with twelve equivalent Nd(1)Nd8Sm4 cuboctahedra, edges with eighteen equivalent Nd(1)Nd8Sm4 cuboctahedra, faces with eight equivalent Sm(1)Nd12 cuboctahedra, and faces with twelve equivalent Nd(1)Nd8Sm4 cuboctahedra. Nd(1) is bonded to four equivalent Sm(1) and eight equivalent Nd(1) atoms to form NdNd8Sm4 cuboctahedra that share corners with four equivalent Sm(1)Nd12 cuboctahedra, corners with fourteen equivalent Nd(1)Nd8Sm4 cuboctahedra, edges with six equivalent Sm(1)Nd12 cuboctahedra, edges with twelve equivalent Nd(1)Nd8Sm4 cuboctahedra, faces with four equivalent Sm(1)Nd12 cuboctahedra, and faces with sixteen equivalent Nd(1)Nd8Sm4 cuboctahedra.
SmNd3 is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to twelve equivalent Nd(1) atoms to form SmNd12 cuboctahedra that share corners with six equivalent Sm(1)Nd12 cuboctahedra, corners with twelve equivalent Nd(1)Nd8Sm4 cuboctahedra, edges with eighteen equivalent Nd(1)Nd8Sm4 cuboctahedra, faces with eight equivalent Sm(1)Nd12 cuboctahedra, and faces with twelve equivalent Nd(1)Nd8Sm4 cuboctahedra. There are six shorter (3.64 Å) and six longer (3.75 Å) Sm(1)-Nd(1) bond lengths. Nd(1) is bonded to four equivalent Sm(1) and eight equivalent Nd(1) atoms to form NdNd8Sm4 cuboctahedra that share corners with four equivalent Sm(1)Nd12 cuboctahedra, corners with fourteen equivalent Nd(1)Nd8Sm4 cuboctahedra, edges with six equivalent Sm(1)Nd12 cuboctahedra, edges with twelve equivalent Nd(1)Nd8Sm4 cuboctahedra, faces with four equivalent Sm(1)Nd12 cuboctahedra, and faces with sixteen equivalent Nd(1)Nd8Sm4 cuboctahedra. There are a spread of Nd(1)-Nd(1) bond distances ranging from 3.64-3.75 Å.