V2Cu3H6O11 crystallizes in the monoclinic C2 space group. V(1) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form VO4 tetrahedra that share corners with two equivalent Cu(1)O6 octahedra, corners with four equivalent Cu(2)O6 octahedra, and  a cornercorner with one V(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-53°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form CuO6 octahedra that share corners with four equivalent V(1)O4 tetrahedra and edges with four equivalent Cu(2)O6 octahedra. In the second Cu site, Cu(2) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted CuO6 octahedra that share corners with four equivalent V(1)O4 tetrahedra, edges with two equivalent Cu(1)O6 octahedra, and edges with two equivalent Cu(2)O6 octahedra. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a distorted linear geometry to one O(1) and one O(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(5) atom. There are six inequivalent O sites. In the first O site, O(6) is bonded in a linear geometry to two equivalent V(1) atoms. In the second O site, O(1) is bonded to one Cu(1), two equivalent Cu(2), and one H(2) atom to form distorted corner-sharing OCu3H tetrahedra. In the third O site, O(2) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent Cu(2) atoms. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one V(1), one Cu(1), and one Cu(2) atom. In the fifth O site, O(4) is bonded in a 3-coordinate geometry to one V(1), one Cu(1), and one Cu(2) atom. In the sixth O site, O(5) is bonded in a distorted water-like geometry to one H(1), one H(2), and one H(3) atom.
V2Cu3H6O11 crystallizes in the monoclinic C2 space group. V(1) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form VO4 tetrahedra that share corners with two equivalent Cu(1)O6 octahedra, corners with four equivalent Cu(2)O6 octahedra, and  a cornercorner with one V(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-53°. The V(1)-O(2) bond length is 1.80 Å. The V(1)-O(3) bond length is 1.70 Å. The V(1)-O(4) bond length is 1.71 Å. The V(1)-O(6) bond length is 1.81 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form CuO6 octahedra that share corners with four equivalent V(1)O4 tetrahedra and edges with four equivalent Cu(2)O6 octahedra. Both Cu(1)-O(1) bond lengths are 1.94 Å. Both Cu(1)-O(3) bond lengths are 2.17 Å. Both Cu(1)-O(4) bond lengths are 2.14 Å. In the second Cu site, Cu(2) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted CuO6 octahedra that share corners with four equivalent V(1)O4 tetrahedra, edges with two equivalent Cu(1)O6 octahedra, and edges with two equivalent Cu(2)O6 octahedra. The Cu(2)-O(3) bond length is 2.52 Å. The Cu(2)-O(4) bond length is 2.48 Å. Both Cu(2)-O(1) bond lengths are 1.94 Å. There is one shorter (2.00 Å) and one longer (2.01 Å) Cu(2)-O(2) bond length. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. The H(1)-O(5) bond length is 0.97 Å. In the second H site, H(2) is bonded in a distorted linear geometry to one O(1) and one O(5) atom. The H(2)-O(1) bond length is 1.02 Å. The H(2)-O(5) bond length is 1.61 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(5) atom. The H(3)-O(5) bond length is 0.98 Å. There are six inequivalent O sites. In the first O site, O(6) is bonded in a linear geometry to two equivalent V(1) atoms. In the second O site, O(1) is bonded to one Cu(1), two equivalent Cu(2), and one H(2) atom to form distorted corner-sharing OCu3H tetrahedra. In the third O site, O(2) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent Cu(2) atoms. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one V(1), one Cu(1), and one Cu(2) atom. In the fifth O site, O(4) is bonded in a 3-coordinate geometry to one V(1), one Cu(1), and one Cu(2) atom. In the sixth O site, O(5) is bonded in a distorted water-like geometry to one H(1), one H(2), and one H(3) atom.