Tb3La is Copper-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Tb(1), four equivalent Tb(2), and four equivalent La(1) atoms to form TbLa4Tb8 cuboctahedra that share corners with twelve equivalent Tb(1)La4Tb8 cuboctahedra, edges with eight equivalent Tb(1)La4Tb8 cuboctahedra, edges with eight equivalent Tb(2)La4Tb8 cuboctahedra, edges with eight equivalent La(1)Tb12 cuboctahedra, faces with four equivalent Tb(2)La4Tb8 cuboctahedra, faces with four equivalent La(1)Tb12 cuboctahedra, and faces with ten equivalent Tb(1)La4Tb8 cuboctahedra. In the second Tb site, Tb(2) is bonded to eight equivalent Tb(1) and four equivalent La(1) atoms to form TbLa4Tb8 cuboctahedra that share corners with four equivalent Tb(2)La4Tb8 cuboctahedra, corners with eight equivalent La(1)Tb12 cuboctahedra, edges with eight equivalent Tb(2)La4Tb8 cuboctahedra, edges with sixteen equivalent Tb(1)La4Tb8 cuboctahedra, faces with four equivalent Tb(2)La4Tb8 cuboctahedra, faces with six equivalent La(1)Tb12 cuboctahedra, and faces with eight equivalent Tb(1)La4Tb8 cuboctahedra. La(1) is bonded to four equivalent Tb(2) and eight equivalent Tb(1) atoms to form LaTb12 cuboctahedra that share corners with four equivalent La(1)Tb12 cuboctahedra, corners with eight equivalent Tb(2)La4Tb8 cuboctahedra, edges with eight equivalent La(1)Tb12 cuboctahedra, edges with sixteen equivalent Tb(1)La4Tb8 cuboctahedra, faces with four equivalent La(1)Tb12 cuboctahedra, faces with six equivalent Tb(2)La4Tb8 cuboctahedra, and faces with eight equivalent Tb(1)La4Tb8 cuboctahedra.
Tb3La is Copper-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Tb(1), four equivalent Tb(2), and four equivalent La(1) atoms to form TbLa4Tb8 cuboctahedra that share corners with twelve equivalent Tb(1)La4Tb8 cuboctahedra, edges with eight equivalent Tb(1)La4Tb8 cuboctahedra, edges with eight equivalent Tb(2)La4Tb8 cuboctahedra, edges with eight equivalent La(1)Tb12 cuboctahedra, faces with four equivalent Tb(2)La4Tb8 cuboctahedra, faces with four equivalent La(1)Tb12 cuboctahedra, and faces with ten equivalent Tb(1)La4Tb8 cuboctahedra. All Tb(1)-Tb(1) bond lengths are 3.63 Å. All Tb(1)-Tb(2) bond lengths are 3.61 Å. All Tb(1)-La(1) bond lengths are 3.61 Å. In the second Tb site, Tb(2) is bonded to eight equivalent Tb(1) and four equivalent La(1) atoms to form TbLa4Tb8 cuboctahedra that share corners with four equivalent Tb(2)La4Tb8 cuboctahedra, corners with eight equivalent La(1)Tb12 cuboctahedra, edges with eight equivalent Tb(2)La4Tb8 cuboctahedra, edges with sixteen equivalent Tb(1)La4Tb8 cuboctahedra, faces with four equivalent Tb(2)La4Tb8 cuboctahedra, faces with six equivalent La(1)Tb12 cuboctahedra, and faces with eight equivalent Tb(1)La4Tb8 cuboctahedra. All Tb(2)-La(1) bond lengths are 3.63 Å. La(1) is bonded to four equivalent Tb(2) and eight equivalent Tb(1) atoms to form LaTb12 cuboctahedra that share corners with four equivalent La(1)Tb12 cuboctahedra, corners with eight equivalent Tb(2)La4Tb8 cuboctahedra, edges with eight equivalent La(1)Tb12 cuboctahedra, edges with sixteen equivalent Tb(1)La4Tb8 cuboctahedra, faces with four equivalent La(1)Tb12 cuboctahedra, faces with six equivalent Tb(2)La4Tb8 cuboctahedra, and faces with eight equivalent Tb(1)La4Tb8 cuboctahedra.