CrHgO4 crystallizes in the monoclinic P2_1/c space group. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. Hg(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cr(1) and one Hg(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one Hg(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cr(1) and two equivalent Hg(1) atoms. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one Hg(1) atom.
CrHgO4 crystallizes in the monoclinic P2_1/c space group. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Cr(1)-O(1) bond length is 1.64 Å. The Cr(1)-O(2) bond length is 1.61 Å. The Cr(1)-O(3) bond length is 1.69 Å. The Cr(1)-O(4) bond length is 1.68 Å. Hg(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), and two equivalent O(3) atoms. The Hg(1)-O(1) bond length is 2.45 Å. The Hg(1)-O(2) bond length is 2.40 Å. The Hg(1)-O(4) bond length is 2.16 Å. There is one shorter (2.15 Å) and one longer (2.56 Å) Hg(1)-O(3) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cr(1) and one Hg(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one Hg(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cr(1) and two equivalent Hg(1) atoms. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one Hg(1) atom.