SmZnSn crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to six equivalent Sn(1) atoms to form edge-sharing SmSn6 octahedra. In the second Sm site, Sm(2) is bonded in a 12-coordinate geometry to six equivalent Zn(1) and six equivalent Sn(1) atoms. Zn(1) is bonded in a 6-coordinate geometry to three equivalent Sm(2) and three equivalent Sn(1) atoms. Sn(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1), three equivalent Sm(2), and three equivalent Zn(1) atoms.
SmZnSn crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to six equivalent Sn(1) atoms to form edge-sharing SmSn6 octahedra. All Sm(1)-Sn(1) bond lengths are 3.22 Å. In the second Sm site, Sm(2) is bonded in a 12-coordinate geometry to six equivalent Zn(1) and six equivalent Sn(1) atoms. All Sm(2)-Zn(1) bond lengths are 3.00 Å. All Sm(2)-Sn(1) bond lengths are 3.41 Å. Zn(1) is bonded in a 6-coordinate geometry to three equivalent Sm(2) and three equivalent Sn(1) atoms. All Zn(1)-Sn(1) bond lengths are 2.69 Å. Sn(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1), three equivalent Sm(2), and three equivalent Zn(1) atoms.