Tb3(Pd2Sb)4 crystallizes in the cubic Fm-3m space group. Tb(1) is bonded in a 13-coordinate geometry to four equivalent Pd(1), four equivalent Pd(2), one Sb(3), and four equivalent Sb(2) atoms. There are two inequivalent Pd sites. In the first Pd site, Pd(2) is bonded in a 6-coordinate geometry to three equivalent Tb(1) and three equivalent Sb(2) atoms. In the second Pd site, Pd(1) is bonded in a 7-coordinate geometry to three equivalent Tb(1), one Sb(1), and three equivalent Sb(2) atoms. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a body-centered cubic geometry to eight equivalent Pd(1) atoms. In the second Sb site, Sb(2) is bonded to four equivalent Tb(1), four equivalent Pd(1), and four equivalent Pd(2) atoms to form SbTb4Pd8 cuboctahedra that share corners with four equivalent Sb(2)Tb4Pd8 cuboctahedra, edges with two equivalent Sb(3)Tb6 octahedra, and faces with eight equivalent Sb(2)Tb4Pd8 cuboctahedra. In the third Sb site, Sb(3) is bonded to six equivalent Tb(1) atoms to form edge-sharing SbTb6 octahedra.
Tb3(Pd2Sb)4 crystallizes in the cubic Fm-3m space group. Tb(1) is bonded in a 13-coordinate geometry to four equivalent Pd(1), four equivalent Pd(2), one Sb(3), and four equivalent Sb(2) atoms. All Tb(1)-Pd(1) bond lengths are 3.05 Å. All Tb(1)-Pd(2) bond lengths are 3.24 Å. The Tb(1)-Sb(3) bond length is 2.99 Å. All Tb(1)-Sb(2) bond lengths are 3.34 Å. There are two inequivalent Pd sites. In the first Pd site, Pd(2) is bonded in a 6-coordinate geometry to three equivalent Tb(1) and three equivalent Sb(2) atoms. All Pd(2)-Sb(2) bond lengths are 2.71 Å. In the second Pd site, Pd(1) is bonded in a 7-coordinate geometry to three equivalent Tb(1), one Sb(1), and three equivalent Sb(2) atoms. The Pd(1)-Sb(1) bond length is 2.73 Å. All Pd(1)-Sb(2) bond lengths are 2.93 Å. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a body-centered cubic geometry to eight equivalent Pd(1) atoms. In the second Sb site, Sb(2) is bonded to four equivalent Tb(1), four equivalent Pd(1), and four equivalent Pd(2) atoms to form SbTb4Pd8 cuboctahedra that share corners with four equivalent Sb(2)Tb4Pd8 cuboctahedra, edges with two equivalent Sb(3)Tb6 octahedra, and faces with eight equivalent Sb(2)Tb4Pd8 cuboctahedra. In the third Sb site, Sb(3) is bonded to six equivalent Tb(1) atoms to form edge-sharing SbTb6 octahedra.