MgTbGa crystallizes in the hexagonal P-62m space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent Ga(1) and two equivalent Ga(2) atoms. Tb(1) is bonded in a 5-coordinate geometry to one Ga(2) and four equivalent Ga(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(2) is bonded in a 9-coordinate geometry to six equivalent Mg(1) and three equivalent Tb(1) atoms. In the second Ga site, Ga(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Tb(1) atoms.
MgTbGa crystallizes in the hexagonal P-62m space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent Ga(1) and two equivalent Ga(2) atoms. Both Mg(1)-Ga(1) bond lengths are 2.80 Å. Both Mg(1)-Ga(2) bond lengths are 2.84 Å. Tb(1) is bonded in a 5-coordinate geometry to one Ga(2) and four equivalent Ga(1) atoms. The Tb(1)-Ga(2) bond length is 3.09 Å. All Tb(1)-Ga(1) bond lengths are 3.10 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(2) is bonded in a 9-coordinate geometry to six equivalent Mg(1) and three equivalent Tb(1) atoms. In the second Ga site, Ga(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Tb(1) atoms.