DySm3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded to four equivalent Sm(2) and eight equivalent Sm(1) atoms to form DySm12 cuboctahedra that share corners with four equivalent Dy(1)Sm12 cuboctahedra, corners with eight equivalent Sm(2)Sm8Dy4 cuboctahedra, edges with eight equivalent Dy(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Dy4 cuboctahedra, faces with four equivalent Dy(1)Sm12 cuboctahedra, faces with six equivalent Sm(2)Sm8Dy4 cuboctahedra, and faces with eight equivalent Sm(1)Sm8Dy4 cuboctahedra. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Dy(1), four equivalent Sm(1), and four equivalent Sm(2) atoms to form SmSm8Dy4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8Dy4 cuboctahedra, edges with eight equivalent Dy(1)Sm12 cuboctahedra, edges with eight equivalent Sm(1)Sm8Dy4 cuboctahedra, edges with eight equivalent Sm(2)Sm8Dy4 cuboctahedra, faces with four equivalent Dy(1)Sm12 cuboctahedra, faces with four equivalent Sm(2)Sm8Dy4 cuboctahedra, and faces with ten equivalent Sm(1)Sm8Dy4 cuboctahedra. In the second Sm site, Sm(2) is bonded to four equivalent Dy(1) and eight equivalent Sm(1) atoms to form SmSm8Dy4 cuboctahedra that share corners with four equivalent Sm(2)Sm8Dy4 cuboctahedra, corners with eight equivalent Dy(1)Sm12 cuboctahedra, edges with eight equivalent Sm(2)Sm8Dy4 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Dy4 cuboctahedra, faces with four equivalent Sm(2)Sm8Dy4 cuboctahedra, faces with six equivalent Dy(1)Sm12 cuboctahedra, and faces with eight equivalent Sm(1)Sm8Dy4 cuboctahedra.
DySm3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded to four equivalent Sm(2) and eight equivalent Sm(1) atoms to form DySm12 cuboctahedra that share corners with four equivalent Dy(1)Sm12 cuboctahedra, corners with eight equivalent Sm(2)Sm8Dy4 cuboctahedra, edges with eight equivalent Dy(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Dy4 cuboctahedra, faces with four equivalent Dy(1)Sm12 cuboctahedra, faces with six equivalent Sm(2)Sm8Dy4 cuboctahedra, and faces with eight equivalent Sm(1)Sm8Dy4 cuboctahedra. All Dy(1)-Sm(2) bond lengths are 3.61 Å. All Dy(1)-Sm(1) bond lengths are 3.61 Å. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Dy(1), four equivalent Sm(1), and four equivalent Sm(2) atoms to form SmSm8Dy4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8Dy4 cuboctahedra, edges with eight equivalent Dy(1)Sm12 cuboctahedra, edges with eight equivalent Sm(1)Sm8Dy4 cuboctahedra, edges with eight equivalent Sm(2)Sm8Dy4 cuboctahedra, faces with four equivalent Dy(1)Sm12 cuboctahedra, faces with four equivalent Sm(2)Sm8Dy4 cuboctahedra, and faces with ten equivalent Sm(1)Sm8Dy4 cuboctahedra. All Sm(1)-Sm(1) bond lengths are 3.61 Å. All Sm(1)-Sm(2) bond lengths are 3.61 Å. In the second Sm site, Sm(2) is bonded to four equivalent Dy(1) and eight equivalent Sm(1) atoms to form SmSm8Dy4 cuboctahedra that share corners with four equivalent Sm(2)Sm8Dy4 cuboctahedra, corners with eight equivalent Dy(1)Sm12 cuboctahedra, edges with eight equivalent Sm(2)Sm8Dy4 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Dy4 cuboctahedra, faces with four equivalent Sm(2)Sm8Dy4 cuboctahedra, faces with six equivalent Dy(1)Sm12 cuboctahedra, and faces with eight equivalent Sm(1)Sm8Dy4 cuboctahedra.