Materials Data on AgHgAsO4 by Materials Project

Abstract

AgHgAsO4 crystallizes in the orthorhombic Fdd2 space group. The structure is three-dimensional. Ag1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ag–O bond distances ranging from 2.25–2.73 Å. Hg2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Hg–O bond distances ranging from 2.22–2.73 Å. As5+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.72 Å) and two longer (1.75 Å) As–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ag1+, two equivalent Hg2+, and one As5+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ag1+, one Hg2+, and one As5+ atom.