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4 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on H8Se(NO2)2 by Materials Project

(NH4)2SeO4 is Iron carbide-derived structured and crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of eight ammonium molecules and four SeO4 clusters. In each SeO4 cluster, Se2- is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.67–1.69 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted 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 distorted single-bond geometry to one Se2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H2SeNO4 by Materials Project

H6Se3(NO5)2NO2 crystallizes in the monoclinic C2 space group. The structure is zero-dimensional and consists of two nitrous acid molecules and two H6Se3(NO5)2 clusters. In each H6Se3(NO5)2 cluster, N is bonded in a distorted trigonal planar geometry to two H and one O atom. There is one shorter (1.04 Å) and one longer (1.73 Å) N–H bond length. The N–O bond length is 1.33 Å. There are three inequivalent H sites. In the first H site, H is bonded in a distorted single-bond geometry to one N and one O atom. The H–O bond length is 1.02 Å. In the second H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the third H site, H is bonded in a single-bond geometry to one N atom. There are two inequivalent Se sites. In the first Se site, Se is bonded in a tetrahedral geometry to four O atoms. There is two shorter (1.63 Å) and two longer (1.78 Å) Se–O bond length. In the second Se site, Se is bonded in a distorted trigonal non-coplanar geometry to three O atoms. There are a spread of Se–O bond distances ranging from 1.62–1.98 Å. There are five inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Se atom. In the second O site, O is bonded in a water-like geometry to one H and one Se atom. In the third O site, O is bonded in a single-bond geometry to one Se atom. In the fourth O site, O is bonded in a water-like geometry to one H and one Se atom. In the fifth O site, O is bonded in a bent 120 degrees geometry to one N and one Se atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HSeNO4 by Materials Project

N2(HSeO4)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is one-dimensional and consists of four ammonia molecules and four HSeO4 ribbons oriented in the (1, 0, 0) direction. In each HSeO4 ribbon, 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. Se4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.65–1.74 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Se4+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one Se4+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one H1+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one H1+ and one Se4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H8Se2N2O5 by Materials Project

(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.

36 MATERIALS SCIENCE↗