Materials Data on HgSeO4 by Materials Project
HgSeO4 crystallizes in the orthorhombic Pmn2_1 space group. The structure is three-dimensional. Hg2+ is bonded in a 4-coordinate geometry to seven O2- atoms. There are a spread of Hg–O bond distances ranging from 2.30–3.06 Å. Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.67 Å) and two longer (1.70 Å) Se–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Hg2+ and one Se6+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Hg2+ and one Se6+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Hg2+ and one Se6+ atom.
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