H4OTa2O6 crystallizes in the orthorhombic Fddd space group. The structure consists of eight water molecules inside a HTaO3 framework. In the HTaO3 framework, Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 32-47°. H(1) is bonded in a single-bond geometry to one O(3) atom. There are three 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.
H4OTa2O6 crystallizes in the orthorhombic Fddd space group. The structure consists of eight water molecules inside a HTaO3 framework. In the HTaO3 framework, Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 32-47°. Both Ta(1)-O(1) bond lengths are 1.94 Å. Both Ta(1)-O(2) bond lengths are 1.97 Å. Both Ta(1)-O(3) bond lengths are 2.10 Å. H(1) is bonded in a single-bond geometry to one O(3) atom. The H(1)-O(3) bond length is 0.99 Å. There are three 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.