LaNiGa2 crystallizes in the orthorhombic Cmmm space group. La(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), two equivalent Ga(1), two equivalent Ga(2), and six equivalent Ga(3) atoms. Ni(1) is bonded in a 10-coordinate geometry to four equivalent La(1), one Ni(1), one Ga(3), two equivalent Ga(1), and two equivalent Ga(2) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent Ni(1) atoms. In the second Ga site, Ga(2) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent Ni(1) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to six equivalent La(1), one Ni(1), and two equivalent Ga(3) atoms.
LaNiGa2 crystallizes in the orthorhombic Cmmm space group. La(1) is bonded in a 14-coordinate geometry to four equivalent Ni(1), two equivalent Ga(1), two equivalent Ga(2), and six equivalent Ga(3) atoms. All La(1)-Ni(1) bond lengths are 3.24 Å. Both La(1)-Ga(1) bond lengths are 3.26 Å. Both La(1)-Ga(2) bond lengths are 3.26 Å. There are four shorter (3.23 Å) and two longer (3.37 Å) La(1)-Ga(3) bond lengths. Ni(1) is bonded in a 10-coordinate geometry to four equivalent La(1), one Ni(1), one Ga(3), two equivalent Ga(1), and two equivalent Ga(2) atoms. The Ni(1)-Ni(1) bond length is 2.48 Å. The Ni(1)-Ga(3) bond length is 2.43 Å. Both Ni(1)-Ga(1) bond lengths are 2.46 Å. Both Ni(1)-Ga(2) bond lengths are 2.45 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent Ni(1) atoms. In the second Ga site, Ga(2) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent Ni(1) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to six equivalent La(1), one Ni(1), and two equivalent Ga(3) atoms. Both Ga(3)-Ga(3) bond lengths are 2.55 Å.