V2CuH3O7 crystallizes in the triclinic P-1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms. In the second V site, V(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form VO4 tetrahedra that share  a cornercorner with one Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(7) atoms to form CuO6 octahedra that share corners with two equivalent V(2)O4 tetrahedra. In the second Cu site, Cu(2) is bonded in a distorted square co-planar geometry to two equivalent O(4) and two equivalent O(6) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(7) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one V(2) and one Cu(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one V(1) and one V(2) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one V(1), one V(2), and one Cu(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one V(1) and one Cu(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent V(1), one Cu(2), and one H(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one H(2), and one H(3) atom.
V2CuH3O7 crystallizes in the triclinic P-1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms. The V(1)-O(2) bond length is 1.97 Å. The V(1)-O(3) bond length is 2.01 Å. The V(1)-O(4) bond length is 2.05 Å. The V(1)-O(5) bond length is 1.65 Å. There is one shorter (2.07 Å) and one longer (2.35 Å) V(1)-O(6) bond length. In the second V site, V(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form VO4 tetrahedra that share  a cornercorner with one Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 49°. The V(2)-O(1) bond length is 1.72 Å. The V(2)-O(2) bond length is 1.74 Å. The V(2)-O(3) bond length is 1.74 Å. The V(2)-O(4) bond length is 1.79 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(7) atoms to form CuO6 octahedra that share corners with two equivalent V(2)O4 tetrahedra. Both Cu(1)-O(1) bond lengths are 1.99 Å. Both Cu(1)-O(5) bond lengths are 2.41 Å. Both Cu(1)-O(7) bond lengths are 2.01 Å. In the second Cu site, Cu(2) is bonded in a distorted square co-planar geometry to two equivalent O(4) and two equivalent O(6) atoms. Both Cu(2)-O(4) bond lengths are 1.95 Å. Both Cu(2)-O(6) bond lengths are 1.98 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(6) atom. The H(1)-O(6) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(7) atom. The H(2)-O(7) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. The H(3)-O(7) bond length is 0.98 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one V(2) and one Cu(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one V(1) and one V(2) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one V(1), one V(2), and one Cu(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one V(1) and one Cu(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent V(1), one Cu(2), and one H(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one H(2), and one H(3) atom.