Tb3(Pd10P3)2 crystallizes in the cubic Fm-3m space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Pd(1) and twelve equivalent Pd(2) atoms to form distorted TbPd16 tetrahedra that share edges with six equivalent Tb(1)Pd16 tetrahedra and faces with four equivalent Tb(2)P6Pd12 cuboctahedra. In the second Tb site, Tb(2) is bonded to twelve equivalent Pd(2) and six equivalent P(1) atoms to form distorted face-sharing TbP6Pd12 cuboctahedra. There are two inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 4-coordinate geometry to one Tb(1), six equivalent Pd(2), and three equivalent P(1) atoms. In the second Pd site, Pd(2) is bonded in a 14-coordinate geometry to one Tb(2), two equivalent Tb(1), four equivalent Pd(1), five equivalent Pd(2), and two equivalent P(1) atoms. P(1) is bonded in a 9-coordinate geometry to one Tb(2), four equivalent Pd(1), and four equivalent Pd(2) atoms.
Tb3(Pd10P3)2 crystallizes in the cubic Fm-3m space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Pd(1) and twelve equivalent Pd(2) atoms to form distorted TbPd16 tetrahedra that share edges with six equivalent Tb(1)Pd16 tetrahedra and faces with four equivalent Tb(2)P6Pd12 cuboctahedra. All Tb(1)-Pd(1) bond lengths are 2.84 Å. All Tb(1)-Pd(2) bond lengths are 3.33 Å. In the second Tb site, Tb(2) is bonded to twelve equivalent Pd(2) and six equivalent P(1) atoms to form distorted face-sharing TbP6Pd12 cuboctahedra. All Tb(2)-Pd(2) bond lengths are 2.98 Å. All Tb(2)-P(1) bond lengths are 3.21 Å. There are two inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 4-coordinate geometry to one Tb(1), six equivalent Pd(2), and three equivalent P(1) atoms. All Pd(1)-Pd(2) bond lengths are 3.02 Å. All Pd(1)-P(1) bond lengths are 2.48 Å. In the second Pd site, Pd(2) is bonded in a 14-coordinate geometry to one Tb(2), two equivalent Tb(1), four equivalent Pd(1), five equivalent Pd(2), and two equivalent P(1) atoms. There is one shorter (2.66 Å) and four longer (2.98 Å) Pd(2)-Pd(2) bond lengths. Both Pd(2)-P(1) bond lengths are 2.38 Å. P(1) is bonded in a 9-coordinate geometry to one Tb(2), four equivalent Pd(1), and four equivalent Pd(2) atoms.