Materials Data on Hg3AsBrO4 by Materials Project

Abstract

Hg3AsO4Br crystallizes in the cubic P2_13 space group. The structure is three-dimensional. Hg2+ is bonded in a 2-coordinate geometry to three O2- and one Br1- atom. There are a spread of Hg–O bond distances ranging from 2.29–2.77 Å. The Hg–Br bond length is 2.95 Å. As3+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.71 Å) and three longer (1.75 Å) As–O bond length. There are two 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 single-bond geometry to three equivalent Hg2+ and one As3+ atom. Br1- is bonded in a 3-coordinate geometry to three equivalent Hg2+ atoms.