Materials Data on Hg3PO4 by Materials Project

Abstract

Hg3PO4 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of two Hg3PO4 sheets oriented in the (0, 0, 1) direction. there are three inequivalent Hg1+ sites. In the first Hg1+ site, Hg1+ is bonded in a 4-coordinate geometry to three O2- atoms. There are a spread of Hg–O bond distances ranging from 2.24–2.69 Å. In the second Hg1+ site, Hg1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Hg–O bond distances ranging from 2.23–2.76 Å. In the third Hg1+ site, Hg1+ is bonded in a 2-coordinate geometry to three O2- atoms. There are a spread of Hg–O bond distances ranging from 2.22–2.87 Å. P5+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.56 Å) and one longer (1.58 Å) P–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Hg1+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three Hg1+ and one P5+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two Hg1+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Hg1+ and one P5+ atom.