CrHgO4 crystallizes in the orthorhombic Cmcm space group. Cr(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CrO4 tetrahedra that share corners with six equivalent Hg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-55°. Hg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form HgO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra and edges with two equivalent Hg(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1) and two equivalent Hg(1) atoms. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cr(1) and one Hg(1) atom.
CrHgO4 crystallizes in the orthorhombic Cmcm space group. Cr(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CrO4 tetrahedra that share corners with six equivalent Hg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-55°. Both Cr(1)-O(1) bond lengths are 1.68 Å. Both Cr(1)-O(2) bond lengths are 1.62 Å. Hg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form HgO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra and edges with two equivalent Hg(1)O6 octahedra. Both Hg(1)-O(2) bond lengths are 2.32 Å. All Hg(1)-O(1) bond lengths are 2.34 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1) and two equivalent Hg(1) atoms. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cr(1) and one Hg(1) atom.