Materials Data on AgHg2AsO4 by Materials Project
AgHg2AsO4 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Ag1+ is bonded in an L-shaped geometry to two equivalent O2- atoms. Both Ag–O bond lengths are 2.34 Å. Hg2+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Hg–O bond distances ranging from 2.31–2.43 Å. As3+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of As–O bond distances ranging from 1.72–1.75 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Hg2+ and one As3+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ag1+, one Hg2+, and one As3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Hg2+ and one As3+ atom.