Sm5Sb3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 5-coordinate geometry to five equivalent Sb(1) atoms. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to six equivalent Sb(1) atoms. Sb(1) is bonded in a 9-coordinate geometry to four equivalent Sm(2) and five equivalent Sm(1) atoms.
Sm5Sb3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 5-coordinate geometry to five equivalent Sb(1) atoms. There are a spread of Sm(1)-Sb(1) bond distances ranging from 3.12-3.45 Å. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to six equivalent Sb(1) atoms. All Sm(2)-Sb(1) bond lengths are 3.28 Å. Sb(1) is bonded in a 9-coordinate geometry to four equivalent Sm(2) and five equivalent Sm(1) atoms.