Sm3(Pd10P3)2 crystallizes in the cubic Fm-3m space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Pd(1) and twelve equivalent Pd(2) atoms to form distorted SmPd16 tetrahedra that share edges with six equivalent Sm(1)Pd16 tetrahedra and faces with four equivalent Sm(2)P6Pd12 cuboctahedra. In the second Sm site, Sm(2) is bonded to twelve equivalent Pd(2) and six equivalent P(1) atoms to form distorted face-sharing SmP6Pd12 cuboctahedra. There are two inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 4-coordinate geometry to one Sm(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 Sm(2), two equivalent Sm(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 Sm(2), four equivalent Pd(1), and four equivalent Pd(2) atoms.
Sm3(Pd10P3)2 crystallizes in the cubic Fm-3m space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Pd(1) and twelve equivalent Pd(2) atoms to form distorted SmPd16 tetrahedra that share edges with six equivalent Sm(1)Pd16 tetrahedra and faces with four equivalent Sm(2)P6Pd12 cuboctahedra. All Sm(1)-Pd(1) bond lengths are 2.87 Å. All Sm(1)-Pd(2) bond lengths are 3.34 Å. In the second Sm site, Sm(2) is bonded to twelve equivalent Pd(2) and six equivalent P(1) atoms to form distorted face-sharing SmP6Pd12 cuboctahedra. All Sm(2)-Pd(2) bond lengths are 3.00 Å. All Sm(2)-P(1) bond lengths are 3.22 Å. There are two inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 4-coordinate geometry to one Sm(1), six equivalent Pd(2), and three equivalent P(1) atoms. All Pd(1)-Pd(2) bond lengths are 3.04 Å. All Pd(1)-P(1) bond lengths are 2.49 Å. In the second Pd site, Pd(2) is bonded in a 14-coordinate geometry to one Sm(2), two equivalent Sm(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 (3.00 Å) Pd(2)-Pd(2) bond lengths. Both Pd(2)-P(1) bond lengths are 2.39 Å. P(1) is bonded in a 9-coordinate geometry to one Sm(2), four equivalent Pd(1), and four equivalent Pd(2) atoms.