La3(Ni2Ga)2 crystallizes in the monoclinic C2/m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one Ni(1), five equivalent Ni(2), and four equivalent Ga(1) atoms. In the second La site, La(2) is bonded in a 2-coordinate geometry to two equivalent Ni(2), six equivalent Ni(1), and six equivalent Ga(1) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to one La(1), three equivalent La(2), one Ni(2), two equivalent Ni(1), and three equivalent Ga(1) atoms. In the second Ni site, Ni(2) is bonded in a 10-coordinate geometry to one La(2), five equivalent La(1), one Ni(1), one Ni(2), and two equivalent Ga(1) atoms. Ga(1) is bonded in a 12-coordinate geometry to three equivalent La(2), four equivalent La(1), two equivalent Ni(2), and three equivalent Ni(1) atoms.
La3(Ni2Ga)2 crystallizes in the monoclinic C2/m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one Ni(1), five equivalent Ni(2), and four equivalent Ga(1) atoms. The La(1)-Ni(1) bond length is 2.87 Å. There are a spread of La(1)-Ni(2) bond distances ranging from 2.99-3.07 Å. There are a spread of La(1)-Ga(1) bond distances ranging from 3.18-3.38 Å. In the second La site, La(2) is bonded in a 2-coordinate geometry to two equivalent Ni(2), six equivalent Ni(1), and six equivalent Ga(1) atoms. Both La(2)-Ni(2) bond lengths are 3.22 Å. There are two shorter (2.83 Å) and four longer (3.25 Å) La(2)-Ni(1) bond lengths. There are four shorter (3.43 Å) and two longer (3.49 Å) La(2)-Ga(1) bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to one La(1), three equivalent La(2), one Ni(2), two equivalent Ni(1), and three equivalent Ga(1) atoms. The Ni(1)-Ni(2) bond length is 2.64 Å. Both Ni(1)-Ni(1) bond lengths are 2.56 Å. There are two shorter (2.43 Å) and one longer (2.44 Å) Ni(1)-Ga(1) bond length. In the second Ni site, Ni(2) is bonded in a 10-coordinate geometry to one La(2), five equivalent La(1), one Ni(1), one Ni(2), and two equivalent Ga(1) atoms. The Ni(2)-Ni(2) bond length is 2.66 Å. Both Ni(2)-Ga(1) bond lengths are 2.55 Å. Ga(1) is bonded in a 12-coordinate geometry to three equivalent La(2), four equivalent La(1), two equivalent Ni(2), and three equivalent Ni(1) atoms.