H4OTa2O6 crystallizes in the orthorhombic Fdd2 space group. Ta(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) atom. In the second H site, H(2) is bonded in a linear geometry to one O(4) 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 five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Ta(1) and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ta(1) and one H(2) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one H(3) and two equivalent H(2) atoms.
H4OTa2O6 crystallizes in the orthorhombic Fdd2 space group. Ta(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. The Ta(1)-O(2) bond length is 1.92 Å. The Ta(1)-O(3) bond length is 2.12 Å. The Ta(1)-O(4) bond length is 1.86 Å. There is one shorter (1.91 Å) and one longer (1.93 Å) Ta(1)-O(1) 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(3) atom. The H(1)-O(3) bond length is 0.97 Å. In the second H site, H(2) is bonded in a linear geometry to one O(4) and one O(5) atom. The H(2)-O(4) bond length is 1.23 Å. The H(2)-O(5) bond length is 1.23 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 five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Ta(1) and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ta(1) and one H(2) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one H(3) and two equivalent H(2) atoms.