Tb6Ni2Ga crystallizes in the orthorhombic Immm space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 4-coordinate geometry to one Ni(1), one Ni(2), one Ga(1), and one Ga(2) atom. In the second Tb site, Tb(2) is bonded in a 4-coordinate geometry to one Ni(2), two equivalent Ni(1), and one Ga(2) atom. In the third Tb site, Tb(3) is bonded in a 4-coordinate geometry to one Ni(1), two equivalent Ni(2), one Ga(1), and one Ga(2) atom. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), four equivalent Tb(2), and one Ni(1) atom. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), four equivalent Tb(3), and one Ni(2) atom. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a body-centered cubic geometry to four equivalent Tb(1) and four equivalent Tb(3) atoms. In the second Ga site, Ga(2) is bonded in a cuboctahedral geometry to four equivalent Tb(1), four equivalent Tb(2), and four equivalent Tb(3) atoms.
Tb6Ni2Ga crystallizes in the orthorhombic Immm space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 4-coordinate geometry to one Ni(1), one Ni(2), one Ga(1), and one Ga(2) atom. The Tb(1)-Ni(1) bond length is 2.79 Å. The Tb(1)-Ni(2) bond length is 3.25 Å. The Tb(1)-Ga(1) bond length is 3.00 Å. The Tb(1)-Ga(2) bond length is 3.26 Å. In the second Tb site, Tb(2) is bonded in a 4-coordinate geometry to one Ni(2), two equivalent Ni(1), and one Ga(2) atom. The Tb(2)-Ni(2) bond length is 2.69 Å. Both Tb(2)-Ni(1) bond lengths are 2.87 Å. The Tb(2)-Ga(2) bond length is 3.37 Å. In the third Tb site, Tb(3) is bonded in a 4-coordinate geometry to one Ni(1), two equivalent Ni(2), one Ga(1), and one Ga(2) atom. The Tb(3)-Ni(1) bond length is 3.14 Å. Both Tb(3)-Ni(2) bond lengths are 2.91 Å. The Tb(3)-Ga(1) bond length is 3.19 Å. The Tb(3)-Ga(2) bond length is 3.63 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), four equivalent Tb(2), and one Ni(1) atom. The Ni(1)-Ni(1) bond length is 2.75 Å. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), four equivalent Tb(3), and one Ni(2) atom. The Ni(2)-Ni(2) bond length is 2.42 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a body-centered cubic geometry to four equivalent Tb(1) and four equivalent Tb(3) atoms. In the second Ga site, Ga(2) is bonded in a cuboctahedral geometry to four equivalent Tb(1), four equivalent Tb(2), and four equivalent Tb(3) atoms.