Tb6FeSb2 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 4-coordinate geometry to two equivalent Fe(1) and two equivalent Sb(1) atoms. In the second Tb site, Tb(2) is bonded in a 5-coordinate geometry to one Fe(1) and four equivalent Sb(1) atoms. Fe(1) is bonded in a 9-coordinate geometry to three equivalent Tb(2) and six equivalent Tb(1) atoms. Sb(1) is bonded in a 9-coordinate geometry to three equivalent Tb(1) and six equivalent Tb(2) atoms.
Tb6FeSb2 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 4-coordinate geometry to two equivalent Fe(1) and two equivalent Sb(1) atoms. Both Tb(1)-Fe(1) bond lengths are 2.84 Å. Both Tb(1)-Sb(1) bond lengths are 3.24 Å. In the second Tb site, Tb(2) is bonded in a 5-coordinate geometry to one Fe(1) and four equivalent Sb(1) atoms. The Tb(2)-Fe(1) bond length is 3.31 Å. All Tb(2)-Sb(1) bond lengths are 3.27 Å. Fe(1) is bonded in a 9-coordinate geometry to three equivalent Tb(2) and six equivalent Tb(1) atoms. Sb(1) is bonded in a 9-coordinate geometry to three equivalent Tb(1) and six equivalent Tb(2) atoms.