Hg2OCl crystallizes in the monoclinic C2/c space group. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 3-coordinate geometry to two equivalent O(1) and one Cl(1) atom. In the second Hg site, Hg(2) is bonded in a 2-coordinate geometry to two equivalent O(1) and two equivalent Cl(1) atoms. In the third Hg site, Hg(3) is bonded in a linear geometry to two equivalent O(1) atoms. O(1) is bonded to one Hg(2), one Hg(3), and two equivalent Hg(1) atoms to form a mixture of corner and edge-sharing OHg4 tetrahedra. Cl(1) is bonded in an L-shaped geometry to one Hg(1) and one Hg(2) atom.
Hg2OCl crystallizes in the monoclinic C2/c space group. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 3-coordinate geometry to two equivalent O(1) and one Cl(1) atom. There is one shorter (2.30 Å) and one longer (2.56 Å) Hg(1)-O(1) bond length. The Hg(1)-Cl(1) bond length is 2.61 Å. In the second Hg site, Hg(2) is bonded in a 2-coordinate geometry to two equivalent O(1) and two equivalent Cl(1) atoms. Both Hg(2)-O(1) bond lengths are 2.32 Å. Both Hg(2)-Cl(1) bond lengths are 2.89 Å. In the third Hg site, Hg(3) is bonded in a linear geometry to two equivalent O(1) atoms. Both Hg(3)-O(1) bond lengths are 2.07 Å. O(1) is bonded to one Hg(2), one Hg(3), and two equivalent Hg(1) atoms to form a mixture of corner and edge-sharing OHg4 tetrahedra. Cl(1) is bonded in an L-shaped geometry to one Hg(1) and one Hg(2) atom.