U2CuGa3 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 14-coordinate geometry to two equivalent U(1), two equivalent Cu(1), two equivalent Ga(3), four equivalent Ga(1), and four equivalent Ga(2) atoms. In the second U site, U(2) is bonded in a 14-coordinate geometry to two equivalent U(2), four equivalent Cu(1), two equivalent Ga(1), two equivalent Ga(2), and four equivalent Ga(3) atoms. Cu(1) is bonded in a 11-coordinate geometry to two equivalent U(1), four equivalent U(2), two equivalent Cu(1), one Ga(3), and two equivalent Ga(2) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), one Ga(2), two equivalent Ga(1), and two equivalent Ga(3) atoms. In the second Ga site, Ga(2) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Cu(1), one Ga(1), and two equivalent Ga(2) atoms. In the third Ga site, Ga(3) is bonded in a 11-coordinate geometry to two equivalent U(1), four equivalent U(2), one Cu(1), two equivalent Ga(1), and two equivalent Ga(3) atoms.
U2CuGa3 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 14-coordinate geometry to two equivalent U(1), two equivalent Cu(1), two equivalent Ga(3), four equivalent Ga(1), and four equivalent Ga(2) atoms. Both U(1)-U(1) bond lengths are 2.93 Å. Both U(1)-Cu(1) bond lengths are 3.05 Å. Both U(1)-Ga(3) bond lengths are 3.17 Å. All U(1)-Ga(1) bond lengths are 3.09 Å. All U(1)-Ga(2) bond lengths are 3.09 Å. In the second U site, U(2) is bonded in a 14-coordinate geometry to two equivalent U(2), four equivalent Cu(1), two equivalent Ga(1), two equivalent Ga(2), and four equivalent Ga(3) atoms. Both U(2)-U(2) bond lengths are 2.93 Å. All U(2)-Cu(1) bond lengths are 3.08 Å. Both U(2)-Ga(1) bond lengths are 3.08 Å. Both U(2)-Ga(2) bond lengths are 3.02 Å. All U(2)-Ga(3) bond lengths are 3.04 Å. Cu(1) is bonded in a 11-coordinate geometry to two equivalent U(1), four equivalent U(2), two equivalent Cu(1), one Ga(3), and two equivalent Ga(2) atoms. Both Cu(1)-Cu(1) bond lengths are 2.93 Å. The Cu(1)-Ga(3) bond length is 2.65 Å. Both Cu(1)-Ga(2) bond lengths are 2.66 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), one Ga(2), two equivalent Ga(1), and two equivalent Ga(3) atoms. The Ga(1)-Ga(2) bond length is 2.79 Å. Both Ga(1)-Ga(1) bond lengths are 2.93 Å. Both Ga(1)-Ga(3) bond lengths are 2.74 Å. In the second Ga site, Ga(2) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Cu(1), one Ga(1), and two equivalent Ga(2) atoms. Both Ga(2)-Ga(2) bond lengths are 2.93 Å. In the third Ga site, Ga(3) is bonded in a 11-coordinate geometry to two equivalent U(1), four equivalent U(2), one Cu(1), two equivalent Ga(1), and two equivalent Ga(3) atoms. Both Ga(3)-Ga(3) bond lengths are 2.93 Å.