Tb2FeGa3 is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. Tb(1) is bonded to three equivalent Fe(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms to form a mixture of edge and face-sharing TbGa9Fe3 cuboctahedra. Fe(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ga(2) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ga(3) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Fe(1) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ga(1) atoms.
Tb2FeGa3 is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. Tb(1) is bonded to three equivalent Fe(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms to form a mixture of edge and face-sharing TbGa9Fe3 cuboctahedra. All Tb(1)-Fe(1) bond lengths are 3.04 Å. All Tb(1)-Ga(1) bond lengths are 3.20 Å. All Tb(1)-Ga(2) bond lengths are 3.04 Å. All Tb(1)-Ga(3) bond lengths are 3.20 Å. Fe(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ga(2) atoms. All Fe(1)-Ga(2) bond lengths are 2.48 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ga(3) atoms. All Ga(1)-Ga(3) bond lengths are 2.48 Å. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Fe(1) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ga(1) atoms.