Hg2MoO4 crystallizes in the monoclinic C2/c space group. Mo(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Hg(1) is bonded in a 3-coordinate geometry to one O(2) and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Mo(1) and two equivalent Hg(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mo(1) and one Hg(1) atom.
Hg2MoO4 crystallizes in the monoclinic C2/c space group. Mo(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Both Mo(1)-O(1) bond lengths are 1.74 Å. There are two shorter (1.90 Å) and two longer (2.29 Å) Mo(1)-O(2) bond lengths. Hg(1) is bonded in a 3-coordinate geometry to one O(2) and two equivalent O(1) atoms. The Hg(1)-O(2) bond length is 2.17 Å. There is one shorter (2.57 Å) and one longer (2.61 Å) Hg(1)-O(1) bond length. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Mo(1) and two equivalent Hg(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mo(1) and one Hg(1) atom.