Cr(SeO2OH)(Se2O5) crystallizes in the monoclinic P2_1/c space group. Cr(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. H(1) is bonded in a single-bond geometry to one O(1) and one O(7) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(8) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(3), one O(4), and one O(8) atom. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom. In the second O site, O(5) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the third O site, O(6) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the fourth O site, O(7) is bonded in a water-like geometry to one H(1) and one Se(3) atom. In the fifth O site, O(8) is bonded in a bent 120 degrees geometry to one Se(1) and one Se(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one H(1), and one Se(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one Se(1) atom. In the eighth O site, O(3) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom.
Cr(SeO2OH)(Se2O5) crystallizes in the monoclinic P2_1/c space group. Cr(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Cr(1)-O(1) bond length is 2.05 Å. The Cr(1)-O(2) bond length is 2.03 Å. The Cr(1)-O(3) bond length is 2.02 Å. The Cr(1)-O(4) bond length is 2.03 Å. The Cr(1)-O(5) bond length is 2.02 Å. The Cr(1)-O(6) bond length is 2.02 Å. H(1) is bonded in a single-bond geometry to one O(1) and one O(7) atom. The H(1)-O(1) bond length is 1.74 Å. The H(1)-O(7) bond length is 1.01 Å. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(8) atom. The Se(1)-O(1) bond length is 1.72 Å. The Se(1)-O(2) bond length is 1.70 Å. The Se(1)-O(8) bond length is 1.84 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(3), one O(4), and one O(8) atom. The Se(2)-O(3) bond length is 1.70 Å. The Se(2)-O(4) bond length is 1.70 Å. The Se(2)-O(8) bond length is 1.85 Å. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(7) atom. The Se(3)-O(5) bond length is 1.71 Å. The Se(3)-O(6) bond length is 1.73 Å. The Se(3)-O(7) bond length is 1.80 Å. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom. In the second O site, O(5) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the third O site, O(6) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(3) atom. In the fourth O site, O(7) is bonded in a water-like geometry to one H(1) and one Se(3) atom. In the fifth O site, O(8) is bonded in a bent 120 degrees geometry to one Se(1) and one Se(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one H(1), and one Se(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one Se(1) atom. In the eighth O site, O(3) is bonded in a bent 120 degrees geometry to one Cr(1) and one Se(2) atom.