Materials Data on H3NO4 by Materials Project

Abstract

NH3O4 crystallizes in the orthorhombic Pna2_1 space group. The structure is two-dimensional and consists of two NH3O4 sheets oriented in the (0, 1, 0) direction. N5+ is bonded in a trigonal planar geometry to three O2- atoms. All N–O bond lengths are 1.27 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.51 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.57 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.56 Å) H–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one N5+ and one H1+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one N5+ and one H1+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one N5+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a trigonal non-coplanar geometry to three H1+ atoms.