TbNi3Sn2 crystallizes in the hexagonal P-62m space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 18-coordinate geometry to three equivalent Ni(2), six equivalent Ni(1), three equivalent Sn(1), and six equivalent Sn(2) atoms. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to six equivalent Ni(1), six equivalent Ni(2), and six equivalent Sn(1) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to one Tb(2), two equivalent Tb(1), one Ni(1), two equivalent Ni(2), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the second Ni site, Ni(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), four equivalent Ni(1), two equivalent Sn(1), and two equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), two equivalent Ni(2), and four equivalent Ni(1) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to four equivalent Tb(1), two equivalent Ni(2), and four equivalent Ni(1) atoms.
TbNi3Sn2 crystallizes in the hexagonal P-62m space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 18-coordinate geometry to three equivalent Ni(2), six equivalent Ni(1), three equivalent Sn(1), and six equivalent Sn(2) atoms. All Tb(1)-Ni(2) bond lengths are 3.27 Å. All Tb(1)-Ni(1) bond lengths are 3.18 Å. All Tb(1)-Sn(1) bond lengths are 3.53 Å. All Tb(1)-Sn(2) bond lengths are 3.43 Å. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to six equivalent Ni(1), six equivalent Ni(2), and six equivalent Sn(1) atoms. All Tb(2)-Ni(1) bond lengths are 3.00 Å. All Tb(2)-Ni(2) bond lengths are 3.49 Å. All Tb(2)-Sn(1) bond lengths are 3.16 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to one Tb(2), two equivalent Tb(1), one Ni(1), two equivalent Ni(2), two equivalent Sn(1), and two equivalent Sn(2) atoms. The Ni(1)-Ni(1) bond length is 2.71 Å. Both Ni(1)-Ni(2) bond lengths are 2.69 Å. Both Ni(1)-Sn(1) bond lengths are 2.54 Å. There is one shorter (2.49 Å) and one longer (2.60 Å) Ni(1)-Sn(2) bond length. In the second Ni site, Ni(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), four equivalent Ni(1), two equivalent Sn(1), and two equivalent Sn(2) atoms. Both Ni(2)-Sn(1) bond lengths are 2.58 Å. Both Ni(2)-Sn(2) bond lengths are 2.67 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), two equivalent Ni(2), and four equivalent Ni(1) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to four equivalent Tb(1), two equivalent Ni(2), and four equivalent Ni(1) atoms.