DyTb3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded to four equivalent Tb(2) and eight equivalent Tb(1) atoms to form DyTb12 cuboctahedra that share corners with four equivalent Dy(1)Tb12 cuboctahedra, corners with eight equivalent Tb(2)Tb8Dy4 cuboctahedra, edges with eight equivalent Dy(1)Tb12 cuboctahedra, edges with sixteen equivalent Tb(1)Tb8Dy4 cuboctahedra, faces with four equivalent Dy(1)Tb12 cuboctahedra, faces with six equivalent Tb(2)Tb8Dy4 cuboctahedra, and faces with eight equivalent Tb(1)Tb8Dy4 cuboctahedra. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Dy(1), four equivalent Tb(1), and four equivalent Tb(2) atoms to form TbTb8Dy4 cuboctahedra that share corners with twelve equivalent Tb(1)Tb8Dy4 cuboctahedra, edges with eight equivalent Dy(1)Tb12 cuboctahedra, edges with eight equivalent Tb(1)Tb8Dy4 cuboctahedra, edges with eight equivalent Tb(2)Tb8Dy4 cuboctahedra, faces with four equivalent Dy(1)Tb12 cuboctahedra, faces with four equivalent Tb(2)Tb8Dy4 cuboctahedra, and faces with ten equivalent Tb(1)Tb8Dy4 cuboctahedra. In the second Tb site, Tb(2) is bonded to four equivalent Dy(1) and eight equivalent Tb(1) atoms to form TbTb8Dy4 cuboctahedra that share corners with four equivalent Tb(2)Tb8Dy4 cuboctahedra, corners with eight equivalent Dy(1)Tb12 cuboctahedra, edges with eight equivalent Tb(2)Tb8Dy4 cuboctahedra, edges with sixteen equivalent Tb(1)Tb8Dy4 cuboctahedra, faces with four equivalent Tb(2)Tb8Dy4 cuboctahedra, faces with six equivalent Dy(1)Tb12 cuboctahedra, and faces with eight equivalent Tb(1)Tb8Dy4 cuboctahedra.
DyTb3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded to four equivalent Tb(2) and eight equivalent Tb(1) atoms to form DyTb12 cuboctahedra that share corners with four equivalent Dy(1)Tb12 cuboctahedra, corners with eight equivalent Tb(2)Tb8Dy4 cuboctahedra, edges with eight equivalent Dy(1)Tb12 cuboctahedra, edges with sixteen equivalent Tb(1)Tb8Dy4 cuboctahedra, faces with four equivalent Dy(1)Tb12 cuboctahedra, faces with six equivalent Tb(2)Tb8Dy4 cuboctahedra, and faces with eight equivalent Tb(1)Tb8Dy4 cuboctahedra. All Dy(1)-Tb(2) bond lengths are 3.56 Å. All Dy(1)-Tb(1) bond lengths are 3.56 Å. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Dy(1), four equivalent Tb(1), and four equivalent Tb(2) atoms to form TbTb8Dy4 cuboctahedra that share corners with twelve equivalent Tb(1)Tb8Dy4 cuboctahedra, edges with eight equivalent Dy(1)Tb12 cuboctahedra, edges with eight equivalent Tb(1)Tb8Dy4 cuboctahedra, edges with eight equivalent Tb(2)Tb8Dy4 cuboctahedra, faces with four equivalent Dy(1)Tb12 cuboctahedra, faces with four equivalent Tb(2)Tb8Dy4 cuboctahedra, and faces with ten equivalent Tb(1)Tb8Dy4 cuboctahedra. All Tb(1)-Tb(1) bond lengths are 3.56 Å. All Tb(1)-Tb(2) bond lengths are 3.56 Å. In the second Tb site, Tb(2) is bonded to four equivalent Dy(1) and eight equivalent Tb(1) atoms to form TbTb8Dy4 cuboctahedra that share corners with four equivalent Tb(2)Tb8Dy4 cuboctahedra, corners with eight equivalent Dy(1)Tb12 cuboctahedra, edges with eight equivalent Tb(2)Tb8Dy4 cuboctahedra, edges with sixteen equivalent Tb(1)Tb8Dy4 cuboctahedra, faces with four equivalent Tb(2)Tb8Dy4 cuboctahedra, faces with six equivalent Dy(1)Tb12 cuboctahedra, and faces with eight equivalent Tb(1)Tb8Dy4 cuboctahedra.