Cr2HO4 crystallizes in the monoclinic P2/m space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of edge and corner-sharing CrO6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. In the second Cr site, Cr(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of edge and corner-sharing CrO6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. H(1) is bonded in a linear geometry to two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Cr(1) and two equivalent Cr(2) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Cr(2), two equivalent Cr(1), and one H(1) atom.
Cr2HO4 crystallizes in the monoclinic P2/m space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of edge and corner-sharing CrO6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. Both Cr(1)-O(1) bond lengths are 1.92 Å. All Cr(1)-O(2) bond lengths are 2.02 Å. In the second Cr site, Cr(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of edge and corner-sharing CrO6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. Both Cr(2)-O(2) bond lengths are 2.04 Å. All Cr(2)-O(1) bond lengths are 1.97 Å. H(1) is bonded in a linear geometry to two equivalent O(2) atoms. Both H(1)-O(2) bond lengths are 1.21 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Cr(1) and two equivalent Cr(2) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Cr(2), two equivalent Cr(1), and one H(1) atom.