K2OsH4O6 crystallizes in the tetragonal I4/mmm space group. K(1) is bonded in a 8-coordinate geometry to eight equivalent O(2) atoms. Os(1) is bonded in an octahedral geometry to two equivalent O(1) and four equivalent O(2) atoms. H(1) is bonded in a single-bond geometry to one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Os(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to four equivalent K(1), one Os(1), and one H(1) atom.
K2OsH4O6 crystallizes in the tetragonal I4/mmm space group. K(1) is bonded in a 8-coordinate geometry to eight equivalent O(2) atoms. All K(1)-O(2) bond lengths are 2.86 Å. Os(1) is bonded in an octahedral geometry to two equivalent O(1) and four equivalent O(2) atoms. Both Os(1)-O(1) bond lengths are 1.81 Å. All Os(1)-O(2) bond lengths are 2.00 Å. H(1) is bonded in a single-bond geometry to one O(2) atom. The H(1)-O(2) bond length is 0.97 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Os(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to four equivalent K(1), one Os(1), and one H(1) atom.