Tm3(Pd2Sb)4 crystallizes in the cubic Fm-3m space group. Tm(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 Tm(1) and three equivalent Sb(2) atoms. In the second Pd site, Pd(1) is bonded in a 7-coordinate geometry to three equivalent Tm(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 Tm(1), four equivalent Pd(1), and four equivalent Pd(2) atoms to form SbTm4Pd8 cuboctahedra that share corners with four equivalent Sb(2)Tm4Pd8 cuboctahedra, edges with two equivalent Sb(3)Tm6 octahedra, and faces with eight equivalent Sb(2)Tm4Pd8 cuboctahedra. In the third Sb site, Sb(3) is bonded to six equivalent Tm(1) atoms to form edge-sharing SbTm6 octahedra.
Tm3(Pd2Sb)4 crystallizes in the cubic Fm-3m space group. Tm(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 Tm(1)-Pd(1) bond lengths are 3.03 Å. All Tm(1)-Pd(2) bond lengths are 3.20 Å. The Tm(1)-Sb(3) bond length is 2.96 Å. All Tm(1)-Sb(2) bond lengths are 3.32 Å. There are two inequivalent Pd sites. In the first Pd site, Pd(2) is bonded in a 6-coordinate geometry to three equivalent Tm(1) and three equivalent Sb(2) atoms. All Pd(2)-Sb(2) bond lengths are 2.70 Å. In the second Pd site, Pd(1) is bonded in a 7-coordinate geometry to three equivalent Tm(1), one Sb(1), and three equivalent Sb(2) atoms. The Pd(1)-Sb(1) bond length is 2.71 Å. All Pd(1)-Sb(2) bond lengths are 2.91 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 Tm(1), four equivalent Pd(1), and four equivalent Pd(2) atoms to form SbTm4Pd8 cuboctahedra that share corners with four equivalent Sb(2)Tm4Pd8 cuboctahedra, edges with two equivalent Sb(3)Tm6 octahedra, and faces with eight equivalent Sb(2)Tm4Pd8 cuboctahedra. In the third Sb site, Sb(3) is bonded to six equivalent Tm(1) atoms to form edge-sharing SbTm6 octahedra.