Lu2CuGa3 crystallizes in the trigonal P3m1 space group. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded in a 12-coordinate geometry to three equivalent Cu(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms. In the second Lu site, Lu(2) is bonded in a 12-coordinate geometry to three equivalent Cu(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms. Cu(1) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Lu(2), one Ga(3), and three equivalent Ga(1) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Lu(2), three equivalent Cu(1), and one Ga(2) atom. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Lu(2), one Ga(1), and three equivalent Ga(3) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Lu(2), one Cu(1), and three equivalent Ga(2) atoms.
Lu2CuGa3 crystallizes in the trigonal P3m1 space group. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded in a 12-coordinate geometry to three equivalent Cu(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms. All Lu(1)-Cu(1) bond lengths are 2.81 Å. All Lu(1)-Ga(1) bond lengths are 3.04 Å. All Lu(1)-Ga(2) bond lengths are 3.32 Å. All Lu(1)-Ga(3) bond lengths are 2.90 Å. In the second Lu site, Lu(2) is bonded in a 12-coordinate geometry to three equivalent Cu(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms. All Lu(2)-Cu(1) bond lengths are 3.14 Å. All Lu(2)-Ga(1) bond lengths are 2.89 Å. All Lu(2)-Ga(2) bond lengths are 2.89 Å. All Lu(2)-Ga(3) bond lengths are 3.31 Å. Cu(1) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Lu(2), one Ga(3), and three equivalent Ga(1) atoms. The Cu(1)-Ga(3) bond length is 2.85 Å. All Cu(1)-Ga(1) bond lengths are 2.51 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Lu(2), three equivalent Cu(1), and one Ga(2) atom. The Ga(1)-Ga(2) bond length is 2.99 Å. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Lu(2), one Ga(1), and three equivalent Ga(3) atoms. All Ga(2)-Ga(3) bond lengths are 2.57 Å. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Lu(2), one Cu(1), and three equivalent Ga(2) atoms.