Materials Data on CrHgO4 by Materials Project
CrHgO4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Cr6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Cr–O bond distances ranging from 1.62–1.72 Å. Hg2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Hg–O bond distances ranging from 2.10–2.97 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Cr6+ and two equivalent Hg2+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Cr6+ and one Hg2+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Cr6+ and two equivalent Hg2+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Cr6+ and two equivalent Hg2+ atoms.