Pu3Sc is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pu sites. In the first Pu site, Pu(1) is bonded to four equivalent Pu(1), four equivalent Pu(2), and four equivalent Sc(1) atoms to form PuPu8Sc4 cuboctahedra that share corners with twelve equivalent Pu(1)Pu8Sc4 cuboctahedra, edges with eight equivalent Pu(1)Pu8Sc4 cuboctahedra, edges with eight equivalent Pu(2)Pu8Sc4 cuboctahedra, edges with eight equivalent Sc(1)Pu12 cuboctahedra, faces with four equivalent Pu(2)Pu8Sc4 cuboctahedra, faces with four equivalent Sc(1)Pu12 cuboctahedra, and faces with ten equivalent Pu(1)Pu8Sc4 cuboctahedra. In the second Pu site, Pu(2) is bonded to eight equivalent Pu(1) and four equivalent Sc(1) atoms to form PuPu8Sc4 cuboctahedra that share corners with four equivalent Pu(2)Pu8Sc4 cuboctahedra, corners with eight equivalent Sc(1)Pu12 cuboctahedra, edges with eight equivalent Pu(2)Pu8Sc4 cuboctahedra, edges with sixteen equivalent Pu(1)Pu8Sc4 cuboctahedra, faces with four equivalent Pu(2)Pu8Sc4 cuboctahedra, faces with six equivalent Sc(1)Pu12 cuboctahedra, and faces with eight equivalent Pu(1)Pu8Sc4 cuboctahedra. Sc(1) is bonded to four equivalent Pu(2) and eight equivalent Pu(1) atoms to form ScPu12 cuboctahedra that share corners with four equivalent Sc(1)Pu12 cuboctahedra, corners with eight equivalent Pu(2)Pu8Sc4 cuboctahedra, edges with eight equivalent Sc(1)Pu12 cuboctahedra, edges with sixteen equivalent Pu(1)Pu8Sc4 cuboctahedra, faces with four equivalent Sc(1)Pu12 cuboctahedra, faces with six equivalent Pu(2)Pu8Sc4 cuboctahedra, and faces with eight equivalent Pu(1)Pu8Sc4 cuboctahedra.
Pu3Sc is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pu sites. In the first Pu site, Pu(1) is bonded to four equivalent Pu(1), four equivalent Pu(2), and four equivalent Sc(1) atoms to form PuPu8Sc4 cuboctahedra that share corners with twelve equivalent Pu(1)Pu8Sc4 cuboctahedra, edges with eight equivalent Pu(1)Pu8Sc4 cuboctahedra, edges with eight equivalent Pu(2)Pu8Sc4 cuboctahedra, edges with eight equivalent Sc(1)Pu12 cuboctahedra, faces with four equivalent Pu(2)Pu8Sc4 cuboctahedra, faces with four equivalent Sc(1)Pu12 cuboctahedra, and faces with ten equivalent Pu(1)Pu8Sc4 cuboctahedra. All Pu(1)-Pu(1) bond lengths are 3.24 Å. All Pu(1)-Pu(2) bond lengths are 3.17 Å. All Pu(1)-Sc(1) bond lengths are 3.17 Å. In the second Pu site, Pu(2) is bonded to eight equivalent Pu(1) and four equivalent Sc(1) atoms to form PuPu8Sc4 cuboctahedra that share corners with four equivalent Pu(2)Pu8Sc4 cuboctahedra, corners with eight equivalent Sc(1)Pu12 cuboctahedra, edges with eight equivalent Pu(2)Pu8Sc4 cuboctahedra, edges with sixteen equivalent Pu(1)Pu8Sc4 cuboctahedra, faces with four equivalent Pu(2)Pu8Sc4 cuboctahedra, faces with six equivalent Sc(1)Pu12 cuboctahedra, and faces with eight equivalent Pu(1)Pu8Sc4 cuboctahedra. All Pu(2)-Sc(1) bond lengths are 3.24 Å. Sc(1) is bonded to four equivalent Pu(2) and eight equivalent Pu(1) atoms to form ScPu12 cuboctahedra that share corners with four equivalent Sc(1)Pu12 cuboctahedra, corners with eight equivalent Pu(2)Pu8Sc4 cuboctahedra, edges with eight equivalent Sc(1)Pu12 cuboctahedra, edges with sixteen equivalent Pu(1)Pu8Sc4 cuboctahedra, faces with four equivalent Sc(1)Pu12 cuboctahedra, faces with six equivalent Pu(2)Pu8Sc4 cuboctahedra, and faces with eight equivalent Pu(1)Pu8Sc4 cuboctahedra.