Nd3Pr is Copper-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to four equivalent Nd(1), four equivalent Nd(2), and four equivalent Pr(1) atoms to form NdPr4Nd8 cuboctahedra that share corners with twelve equivalent Nd(1)Pr4Nd8 cuboctahedra, edges with eight equivalent Nd(1)Pr4Nd8 cuboctahedra, edges with eight equivalent Nd(2)Pr4Nd8 cuboctahedra, edges with eight equivalent Pr(1)Nd12 cuboctahedra, faces with four equivalent Nd(2)Pr4Nd8 cuboctahedra, faces with four equivalent Pr(1)Nd12 cuboctahedra, and faces with ten equivalent Nd(1)Pr4Nd8 cuboctahedra. In the second Nd site, Nd(2) is bonded to eight equivalent Nd(1) and four equivalent Pr(1) atoms to form NdPr4Nd8 cuboctahedra that share corners with four equivalent Nd(2)Pr4Nd8 cuboctahedra, corners with eight equivalent Pr(1)Nd12 cuboctahedra, edges with eight equivalent Nd(2)Pr4Nd8 cuboctahedra, edges with sixteen equivalent Nd(1)Pr4Nd8 cuboctahedra, faces with four equivalent Nd(2)Pr4Nd8 cuboctahedra, faces with six equivalent Pr(1)Nd12 cuboctahedra, and faces with eight equivalent Nd(1)Pr4Nd8 cuboctahedra. Pr(1) is bonded to four equivalent Nd(2) and eight equivalent Nd(1) atoms to form PrNd12 cuboctahedra that share corners with four equivalent Pr(1)Nd12 cuboctahedra, corners with eight equivalent Nd(2)Pr4Nd8 cuboctahedra, edges with eight equivalent Pr(1)Nd12 cuboctahedra, edges with sixteen equivalent Nd(1)Pr4Nd8 cuboctahedra, faces with four equivalent Pr(1)Nd12 cuboctahedra, faces with six equivalent Nd(2)Pr4Nd8 cuboctahedra, and faces with eight equivalent Nd(1)Pr4Nd8 cuboctahedra.
Nd3Pr is Copper-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to four equivalent Nd(1), four equivalent Nd(2), and four equivalent Pr(1) atoms to form NdPr4Nd8 cuboctahedra that share corners with twelve equivalent Nd(1)Pr4Nd8 cuboctahedra, edges with eight equivalent Nd(1)Pr4Nd8 cuboctahedra, edges with eight equivalent Nd(2)Pr4Nd8 cuboctahedra, edges with eight equivalent Pr(1)Nd12 cuboctahedra, faces with four equivalent Nd(2)Pr4Nd8 cuboctahedra, faces with four equivalent Pr(1)Nd12 cuboctahedra, and faces with ten equivalent Nd(1)Pr4Nd8 cuboctahedra. All Nd(1)-Nd(1) bond lengths are 3.71 Å. All Nd(1)-Nd(2) bond lengths are 3.69 Å. All Nd(1)-Pr(1) bond lengths are 3.69 Å. In the second Nd site, Nd(2) is bonded to eight equivalent Nd(1) and four equivalent Pr(1) atoms to form NdPr4Nd8 cuboctahedra that share corners with four equivalent Nd(2)Pr4Nd8 cuboctahedra, corners with eight equivalent Pr(1)Nd12 cuboctahedra, edges with eight equivalent Nd(2)Pr4Nd8 cuboctahedra, edges with sixteen equivalent Nd(1)Pr4Nd8 cuboctahedra, faces with four equivalent Nd(2)Pr4Nd8 cuboctahedra, faces with six equivalent Pr(1)Nd12 cuboctahedra, and faces with eight equivalent Nd(1)Pr4Nd8 cuboctahedra. All Nd(2)-Pr(1) bond lengths are 3.71 Å. Pr(1) is bonded to four equivalent Nd(2) and eight equivalent Nd(1) atoms to form PrNd12 cuboctahedra that share corners with four equivalent Pr(1)Nd12 cuboctahedra, corners with eight equivalent Nd(2)Pr4Nd8 cuboctahedra, edges with eight equivalent Pr(1)Nd12 cuboctahedra, edges with sixteen equivalent Nd(1)Pr4Nd8 cuboctahedra, faces with four equivalent Pr(1)Nd12 cuboctahedra, faces with six equivalent Nd(2)Pr4Nd8 cuboctahedra, and faces with eight equivalent Nd(1)Pr4Nd8 cuboctahedra.