Pm3Nd is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to eight equivalent Pm(1) and four equivalent Nd(1) atoms to form PmPm8Nd4 cuboctahedra that share corners with four equivalent Nd(1)Pm12 cuboctahedra, corners with fourteen equivalent Pm(1)Pm8Nd4 cuboctahedra, edges with six equivalent Nd(1)Pm12 cuboctahedra, edges with twelve equivalent Pm(1)Pm8Nd4 cuboctahedra, faces with four equivalent Nd(1)Pm12 cuboctahedra, and faces with sixteen equivalent Pm(1)Pm8Nd4 cuboctahedra. Nd(1) is bonded to twelve equivalent Pm(1) atoms to form NdPm12 cuboctahedra that share corners with six equivalent Nd(1)Pm12 cuboctahedra, corners with twelve equivalent Pm(1)Pm8Nd4 cuboctahedra, edges with eighteen equivalent Pm(1)Pm8Nd4 cuboctahedra, faces with eight equivalent Nd(1)Pm12 cuboctahedra, and faces with twelve equivalent Pm(1)Pm8Nd4 cuboctahedra.
Pm3Nd is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to eight equivalent Pm(1) and four equivalent Nd(1) atoms to form PmPm8Nd4 cuboctahedra that share corners with four equivalent Nd(1)Pm12 cuboctahedra, corners with fourteen equivalent Pm(1)Pm8Nd4 cuboctahedra, edges with six equivalent Nd(1)Pm12 cuboctahedra, edges with twelve equivalent Pm(1)Pm8Nd4 cuboctahedra, faces with four equivalent Nd(1)Pm12 cuboctahedra, and faces with sixteen equivalent Pm(1)Pm8Nd4 cuboctahedra. There are a spread of Pm(1)-Pm(1) bond distances ranging from 3.63-3.74 Å. There are two shorter (3.63 Å) and two longer (3.74 Å) Pm(1)-Nd(1) bond lengths. Nd(1) is bonded to twelve equivalent Pm(1) atoms to form NdPm12 cuboctahedra that share corners with six equivalent Nd(1)Pm12 cuboctahedra, corners with twelve equivalent Pm(1)Pm8Nd4 cuboctahedra, edges with eighteen equivalent Pm(1)Pm8Nd4 cuboctahedra, faces with eight equivalent Nd(1)Pm12 cuboctahedra, and faces with twelve equivalent Pm(1)Pm8Nd4 cuboctahedra.