DOE OSTI2020
HgNO3Hg3N2HO7 crystallizes in the orthorhombic Aea2 space group. The structure is one-dimensional and consists of eight nitrooxymercury molecules and four Hg3N2HO7 ribbons oriented in the (1, 0, 0) direction. In each Hg3N2HO7 ribbon, there are three inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded in a 1-coordinate geometry to one O2- atom. The Hg–O bond length is 2.20 Å. In the second Hg2+ site, Hg2+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Hg–O bond distances ranging from 2.30–2.69 Å. In the third Hg2+ site, Hg2+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Hg–O bond distances ranging from 2.39–2.79 Å. There are two inequivalent N+3.67+ sites. In the first N+3.67+ site, N+3.67+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of N–O bond distances ranging from 1.24–1.31 Å. In the second N+3.67+ site, N+3.67+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of N–O bond distances ranging from 1.25–1.29 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three Hg2+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Hg2+ and one N+3.67+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one Hg2+ and one N+3.67+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one N+3.67+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Hg2+ and one N+3.67+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one Hg2+ and one N+3.67+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one N+3.67+ atom.