PmNd3 is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to twelve equivalent Nd(1) atoms to form PmNd12 cuboctahedra that share corners with six equivalent Pm(1)Nd12 cuboctahedra, corners with twelve equivalent Nd(1)Pm4Nd8 cuboctahedra, edges with eighteen equivalent Nd(1)Pm4Nd8 cuboctahedra, faces with eight equivalent Pm(1)Nd12 cuboctahedra, and faces with twelve equivalent Nd(1)Pm4Nd8 cuboctahedra. Nd(1) is bonded to four equivalent Pm(1) and eight equivalent Nd(1) atoms to form NdPm4Nd8 cuboctahedra that share corners with four equivalent Pm(1)Nd12 cuboctahedra, corners with fourteen equivalent Nd(1)Pm4Nd8 cuboctahedra, edges with six equivalent Pm(1)Nd12 cuboctahedra, edges with twelve equivalent Nd(1)Pm4Nd8 cuboctahedra, faces with four equivalent Pm(1)Nd12 cuboctahedra, and faces with sixteen equivalent Nd(1)Pm4Nd8 cuboctahedra.
PmNd3 is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to twelve equivalent Nd(1) atoms to form PmNd12 cuboctahedra that share corners with six equivalent Pm(1)Nd12 cuboctahedra, corners with twelve equivalent Nd(1)Pm4Nd8 cuboctahedra, edges with eighteen equivalent Nd(1)Pm4Nd8 cuboctahedra, faces with eight equivalent Pm(1)Nd12 cuboctahedra, and faces with twelve equivalent Nd(1)Pm4Nd8 cuboctahedra. There are six shorter (3.65 Å) and six longer (3.75 Å) Pm(1)-Nd(1) bond lengths. Nd(1) is bonded to four equivalent Pm(1) and eight equivalent Nd(1) atoms to form NdPm4Nd8 cuboctahedra that share corners with four equivalent Pm(1)Nd12 cuboctahedra, corners with fourteen equivalent Nd(1)Pm4Nd8 cuboctahedra, edges with six equivalent Pm(1)Nd12 cuboctahedra, edges with twelve equivalent Nd(1)Pm4Nd8 cuboctahedra, faces with four equivalent Pm(1)Nd12 cuboctahedra, and faces with sixteen equivalent Nd(1)Pm4Nd8 cuboctahedra. There are four shorter (3.65 Å) and four longer (3.75 Å) Nd(1)-Nd(1) bond lengths.