TbNiSn4 crystallizes in the orthorhombic Cmmm space group. Tb(1) is bonded in a 10-coordinate geometry to two equivalent Sn(1), two equivalent Sn(3), and six equivalent Sn(2) atoms. Ni(1) is bonded in a distorted body-centered cubic geometry to two equivalent Sn(1), two equivalent Sn(3), two equivalent Sn(4), and two equivalent Sn(5) atoms. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Ni(1), one Sn(5), and four equivalent Sn(3) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to six equivalent Tb(1) and two equivalent Sn(2) atoms. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to two equivalent Tb(1), two equivalent Ni(1), and four equivalent Sn(1) atoms. In the fourth Sn site, Sn(4) is bonded in a 4-coordinate geometry to four equivalent Ni(1) atoms. In the fifth Sn site, Sn(5) is bonded in a 4-coordinate geometry to four equivalent Ni(1) and two equivalent Sn(1) atoms.
TbNiSn4 crystallizes in the orthorhombic Cmmm space group. Tb(1) is bonded in a 10-coordinate geometry to two equivalent Sn(1), two equivalent Sn(3), and six equivalent Sn(2) atoms. Both Tb(1)-Sn(1) bond lengths are 3.27 Å. Both Tb(1)-Sn(3) bond lengths are 3.29 Å. There are four shorter (3.22 Å) and two longer (3.47 Å) Tb(1)-Sn(2) bond lengths. Ni(1) is bonded in a distorted body-centered cubic geometry to two equivalent Sn(1), two equivalent Sn(3), two equivalent Sn(4), and two equivalent Sn(5) atoms. Both Ni(1)-Sn(1) bond lengths are 2.79 Å. Both Ni(1)-Sn(3) bond lengths are 2.76 Å. Both Ni(1)-Sn(4) bond lengths are 2.65 Å. Both Ni(1)-Sn(5) bond lengths are 2.69 Å. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Ni(1), one Sn(5), and four equivalent Sn(3) atoms. The Sn(1)-Sn(5) bond length is 3.09 Å. All Sn(1)-Sn(3) bond lengths are 3.17 Å. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to six equivalent Tb(1) and two equivalent Sn(2) atoms. Both Sn(2)-Sn(2) bond lengths are 3.01 Å. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to two equivalent Tb(1), two equivalent Ni(1), and four equivalent Sn(1) atoms. In the fourth Sn site, Sn(4) is bonded in a 4-coordinate geometry to four equivalent Ni(1) atoms. In the fifth Sn site, Sn(5) is bonded in a 4-coordinate geometry to four equivalent Ni(1) and two equivalent Sn(1) atoms.