SrH2O7I2 crystallizes in the monoclinic C2/c space group. Sr(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. H(1) is bonded in a single-bond geometry to one O(1) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Sr(1) and two equivalent H(1) atoms. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one I(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Sr(1) and one I(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one I(1) atom. I(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(3), and one O(4) atom.
SrH2O7I2 crystallizes in the monoclinic C2/c space group. Sr(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. The Sr(1)-O(1) bond length is 2.54 Å. Both Sr(1)-O(2) bond lengths are 2.73 Å. Both Sr(1)-O(3) bond lengths are 2.72 Å. Both Sr(1)-O(4) bond lengths are 2.57 Å. H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.99 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Sr(1) and two equivalent H(1) atoms. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one I(1) atom. The O(2)-I(1) bond length is 1.83 Å. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Sr(1) and one I(1) atom. The O(3)-I(1) bond length is 1.86 Å. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one I(1) atom. The O(4)-I(1) bond length is 1.82 Å. I(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(3), and one O(4) atom.