Cu2O3 crystallizes in the triclinic P1 space group. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(6), and two equivalent O(2) atoms. In the second Cu site, Cu(2) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(4), one O(5), and two equivalent O(3) atoms. In the third Cu site, Cu(3) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(4), one O(6), and two equivalent O(5) atoms. In the fourth Cu site, Cu(4) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(5), and two equivalent O(6) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Cu(1) and one Cu(4) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Cu(2), one Cu(4), and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one Cu(3), and two equivalent Cu(2) atoms. In the fourth O site, O(4) is bonded in a water-like geometry to one Cu(2) and one Cu(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Cu(2), one Cu(4), and two equivalent Cu(3) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one Cu(3), and two equivalent Cu(4) atoms.
Cu2O3 crystallizes in the triclinic P1 space group. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(6), and two equivalent O(2) atoms. The Cu(1)-O(1) bond length is 1.80 Å. The Cu(1)-O(3) bond length is 1.87 Å. The Cu(1)-O(6) bond length is 1.85 Å. There is one shorter (1.88 Å) and one longer (2.51 Å) Cu(1)-O(2) bond length. In the second Cu site, Cu(2) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(4), one O(5), and two equivalent O(3) atoms. The Cu(2)-O(2) bond length is 1.87 Å. The Cu(2)-O(4) bond length is 1.80 Å. The Cu(2)-O(5) bond length is 1.85 Å. There is one shorter (1.88 Å) and one longer (2.51 Å) Cu(2)-O(3) bond length. In the third Cu site, Cu(3) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(4), one O(6), and two equivalent O(5) atoms. The Cu(3)-O(3) bond length is 1.85 Å. The Cu(3)-O(4) bond length is 1.80 Å. The Cu(3)-O(6) bond length is 1.87 Å. There is one shorter (1.88 Å) and one longer (2.51 Å) Cu(3)-O(5) bond length. In the fourth Cu site, Cu(4) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(5), and two equivalent O(6) atoms. The Cu(4)-O(1) bond length is 1.80 Å. The Cu(4)-O(2) bond length is 1.85 Å. The Cu(4)-O(5) bond length is 1.87 Å. There is one shorter (1.88 Å) and one longer (2.52 Å) Cu(4)-O(6) bond length. There are six inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Cu(1) and one Cu(4) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Cu(2), one Cu(4), and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one Cu(3), and two equivalent Cu(2) atoms. In the fourth O site, O(4) is bonded in a water-like geometry to one Cu(2) and one Cu(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Cu(2), one Cu(4), and two equivalent Cu(3) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one Cu(3), and two equivalent Cu(4) atoms.