TbCoSn2 crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded in a 14-coordinate geometry to four equivalent Co(1), four equivalent Sn(2), and six equivalent Sn(1) atoms. Co(1) is bonded in a 9-coordinate geometry to four equivalent Tb(1), one Sn(1), and four equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1), one Co(1), and two equivalent Sn(1) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to four equivalent Tb(1) and four equivalent Co(1) atoms.
TbCoSn2 crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded in a 14-coordinate geometry to four equivalent Co(1), four equivalent Sn(2), and six equivalent Sn(1) atoms. All Tb(1)-Co(1) bond lengths are 3.35 Å. There are two shorter (3.30 Å) and two longer (3.37 Å) Tb(1)-Sn(2) bond lengths. There are four shorter (3.35 Å) and two longer (3.69 Å) Tb(1)-Sn(1) bond lengths. Co(1) is bonded in a 9-coordinate geometry to four equivalent Tb(1), one Sn(1), and four equivalent Sn(2) atoms. The Co(1)-Sn(1) bond length is 2.41 Å. There are two shorter (2.55 Å) and two longer (2.56 Å) Co(1)-Sn(2) bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1), one Co(1), and two equivalent Sn(1) atoms. Both Sn(1)-Sn(1) bond lengths are 2.85 Å. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to four equivalent Tb(1) and four equivalent Co(1) atoms.