Pu3Dy 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 Dy(1) atoms to form PuDy4Pu8 cuboctahedra that share corners with twelve equivalent Pu(1)Dy4Pu8 cuboctahedra, edges with eight equivalent Pu(1)Dy4Pu8 cuboctahedra, edges with eight equivalent Pu(2)Dy4Pu8 cuboctahedra, edges with eight equivalent Dy(1)Pu12 cuboctahedra, faces with four equivalent Pu(2)Dy4Pu8 cuboctahedra, faces with four equivalent Dy(1)Pu12 cuboctahedra, and faces with ten equivalent Pu(1)Dy4Pu8 cuboctahedra. In the second Pu site, Pu(2) is bonded to eight equivalent Pu(1) and four equivalent Dy(1) atoms to form PuDy4Pu8 cuboctahedra that share corners with four equivalent Pu(2)Dy4Pu8 cuboctahedra, corners with eight equivalent Dy(1)Pu12 cuboctahedra, edges with eight equivalent Pu(2)Dy4Pu8 cuboctahedra, edges with sixteen equivalent Pu(1)Dy4Pu8 cuboctahedra, faces with four equivalent Pu(2)Dy4Pu8 cuboctahedra, faces with six equivalent Dy(1)Pu12 cuboctahedra, and faces with eight equivalent Pu(1)Dy4Pu8 cuboctahedra. Dy(1) is bonded to four equivalent Pu(2) and eight equivalent Pu(1) atoms to form DyPu12 cuboctahedra that share corners with four equivalent Dy(1)Pu12 cuboctahedra, corners with eight equivalent Pu(2)Dy4Pu8 cuboctahedra, edges with eight equivalent Dy(1)Pu12 cuboctahedra, edges with sixteen equivalent Pu(1)Dy4Pu8 cuboctahedra, faces with four equivalent Dy(1)Pu12 cuboctahedra, faces with six equivalent Pu(2)Dy4Pu8 cuboctahedra, and faces with eight equivalent Pu(1)Dy4Pu8 cuboctahedra.
Pu3Dy 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 Dy(1) atoms to form PuDy4Pu8 cuboctahedra that share corners with twelve equivalent Pu(1)Dy4Pu8 cuboctahedra, edges with eight equivalent Pu(1)Dy4Pu8 cuboctahedra, edges with eight equivalent Pu(2)Dy4Pu8 cuboctahedra, edges with eight equivalent Dy(1)Pu12 cuboctahedra, faces with four equivalent Pu(2)Dy4Pu8 cuboctahedra, faces with four equivalent Dy(1)Pu12 cuboctahedra, and faces with ten equivalent Pu(1)Dy4Pu8 cuboctahedra. All Pu(1)-Pu(1) bond lengths are 3.42 Å. All Pu(1)-Pu(2) bond lengths are 3.42 Å. All Pu(1)-Dy(1) bond lengths are 3.42 Å. In the second Pu site, Pu(2) is bonded to eight equivalent Pu(1) and four equivalent Dy(1) atoms to form PuDy4Pu8 cuboctahedra that share corners with four equivalent Pu(2)Dy4Pu8 cuboctahedra, corners with eight equivalent Dy(1)Pu12 cuboctahedra, edges with eight equivalent Pu(2)Dy4Pu8 cuboctahedra, edges with sixteen equivalent Pu(1)Dy4Pu8 cuboctahedra, faces with four equivalent Pu(2)Dy4Pu8 cuboctahedra, faces with six equivalent Dy(1)Pu12 cuboctahedra, and faces with eight equivalent Pu(1)Dy4Pu8 cuboctahedra. All Pu(2)-Dy(1) bond lengths are 3.42 Å. Dy(1) is bonded to four equivalent Pu(2) and eight equivalent Pu(1) atoms to form DyPu12 cuboctahedra that share corners with four equivalent Dy(1)Pu12 cuboctahedra, corners with eight equivalent Pu(2)Dy4Pu8 cuboctahedra, edges with eight equivalent Dy(1)Pu12 cuboctahedra, edges with sixteen equivalent Pu(1)Dy4Pu8 cuboctahedra, faces with four equivalent Dy(1)Pu12 cuboctahedra, faces with six equivalent Pu(2)Dy4Pu8 cuboctahedra, and faces with eight equivalent Pu(1)Dy4Pu8 cuboctahedra.