Y2Cu3 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 13-coordinate geometry to one Y(1), three equivalent Y(2), one Cu(4), one Cu(5), one Cu(6), two equivalent Cu(1), two equivalent Cu(2), and two equivalent Cu(3) atoms. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to three equivalent Y(1), one Cu(1), one Cu(2), one Cu(3), one Cu(4), one Cu(5), and one Cu(6) atom. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted q6 geometry to two equivalent Y(2), four equivalent Y(1), two equivalent Cu(2), and two equivalent Cu(3) atoms. In the second Cu site, Cu(2) is bonded in a distorted q6 geometry to two equivalent Y(2), four equivalent Y(1), two equivalent Cu(1), and two equivalent Cu(3) atoms. In the third Cu site, Cu(3) is bonded in a distorted q6 geometry to two equivalent Y(2), four equivalent Y(1), two equivalent Cu(1), and two equivalent Cu(2) atoms. In the fourth Cu site, Cu(4) is bonded in a 2-coordinate geometry to two equivalent Y(1) and two equivalent Y(2) atoms. In the fifth Cu site, Cu(5) is bonded in a 2-coordinate geometry to two equivalent Y(1) and two equivalent Y(2) atoms. In the sixth Cu site, Cu(6) is bonded in a 2-coordinate geometry to two equivalent Y(1) and two equivalent Y(2) atoms.
Y2Cu3 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 13-coordinate geometry to one Y(1), three equivalent Y(2), one Cu(4), one Cu(5), one Cu(6), two equivalent Cu(1), two equivalent Cu(2), and two equivalent Cu(3) atoms. The Y(1)-Y(1) bond length is 3.30 Å. There is one shorter (3.22 Å) and two longer (3.24 Å) Y(1)-Y(2) bond lengths. The Y(1)-Cu(4) bond length is 3.22 Å. The Y(1)-Cu(5) bond length is 3.22 Å. The Y(1)-Cu(6) bond length is 3.22 Å. There is one shorter (3.16 Å) and one longer (3.17 Å) Y(1)-Cu(1) bond length. Both Y(1)-Cu(2) bond lengths are 3.21 Å. There is one shorter (3.16 Å) and one longer (3.18 Å) Y(1)-Cu(3) bond length. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to three equivalent Y(1), one Cu(1), one Cu(2), one Cu(3), one Cu(4), one Cu(5), and one Cu(6) atom. The Y(2)-Cu(1) bond length is 2.89 Å. The Y(2)-Cu(2) bond length is 2.86 Å. The Y(2)-Cu(3) bond length is 2.89 Å. The Y(2)-Cu(4) bond length is 2.79 Å. The Y(2)-Cu(5) bond length is 2.79 Å. The Y(2)-Cu(6) bond length is 2.77 Å. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted q6 geometry to two equivalent Y(2), four equivalent Y(1), two equivalent Cu(2), and two equivalent Cu(3) atoms. Both Cu(1)-Cu(2) bond lengths are 2.71 Å. Both Cu(1)-Cu(3) bond lengths are 2.75 Å. In the second Cu site, Cu(2) is bonded in a distorted q6 geometry to two equivalent Y(2), four equivalent Y(1), two equivalent Cu(1), and two equivalent Cu(3) atoms. Both Cu(2)-Cu(3) bond lengths are 2.70 Å. In the third Cu site, Cu(3) is bonded in a distorted q6 geometry to two equivalent Y(2), four equivalent Y(1), two equivalent Cu(1), and two equivalent Cu(2) atoms. In the fourth Cu site, Cu(4) is bonded in a 2-coordinate geometry to two equivalent Y(1) and two equivalent Y(2) atoms. In the fifth Cu site, Cu(5) is bonded in a 2-coordinate geometry to two equivalent Y(1) and two equivalent Y(2) atoms. In the sixth Cu site, Cu(6) is bonded in a 2-coordinate geometry to two equivalent Y(1) and two equivalent Y(2) atoms.