Pr2CuGa3 crystallizes in the trigonal P3m1 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to three equivalent Cu(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms to form a mixture of distorted face and edge-sharing PrGa9Cu3 cuboctahedra. In the second Pr site, Pr(2) is bonded to three equivalent Cu(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms to form a mixture of distorted face and edge-sharing PrGa9Cu3 cuboctahedra. Cu(1) is bonded in a 9-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Ga(1) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Cu(1) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Ga(3) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Ga(2) atoms.
Pr2CuGa3 crystallizes in the trigonal P3m1 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to three equivalent Cu(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms to form a mixture of distorted face and edge-sharing PrGa9Cu3 cuboctahedra. All Pr(1)-Cu(1) bond lengths are 3.06 Å. All Pr(1)-Ga(1) bond lengths are 3.20 Å. All Pr(1)-Ga(2) bond lengths are 3.49 Å. All Pr(1)-Ga(3) bond lengths are 3.14 Å. In the second Pr site, Pr(2) is bonded to three equivalent Cu(1), three equivalent Ga(1), three equivalent Ga(2), and three equivalent Ga(3) atoms to form a mixture of distorted face and edge-sharing PrGa9Cu3 cuboctahedra. All Pr(2)-Cu(1) bond lengths are 3.22 Å. All Pr(2)-Ga(1) bond lengths are 3.08 Å. All Pr(2)-Ga(2) bond lengths are 3.11 Å. All Pr(2)-Ga(3) bond lengths are 3.46 Å. Cu(1) is bonded in a 9-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Ga(1) atoms. All Cu(1)-Ga(1) bond lengths are 2.55 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Cu(1) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Ga(3) atoms. All Ga(2)-Ga(3) bond lengths are 2.60 Å. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Ga(2) atoms.