Materials Data on HgSeNO3 by Materials Project

(HgSeO3)2N2 crystallizes in the monoclinic P2_1/c space group. The structure is one-dimensional and consists of four ammonia molecules and two HgSeO3 ribbons oriented in the (0, 1, 0) direction. In each HgSeO3 ribbon, Hg2+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Hg–O bond distances ranging from 2.17–2.93 Å. Se1- is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.73–1.75 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three equivalent Hg2+ and one Se1- atom. In the second O2- site, O2- is bonded in a water-like geometry to one Hg2+ and one Se1- atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Hg2+ and one Se1- atom.