Materials Data on H8Se2N2O5 by Materials Project

Abstract

(NH4)2Se2O5 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is zero-dimensional and consists of eight ammonium molecules and four Se2O5 clusters. In each Se2O5 cluster, there are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.69–1.87 Å. In the second Se2- site, Se2- is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There is two shorter (1.69 Å) and one longer (1.91 Å) Se–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Se2- atom. In the second O2- site, O2- is bonded in a single-bond geometry to one Se2- atom. In the third O2- site, O2- is bonded in a single-bond geometry to one Se2- atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to two Se2- atoms. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one Se2- atom.