Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “F-Fe-H-N”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

2 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on FeH9(NF)3 by Materials Project

FeH9(NF)3 is Hg_xSn-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four FeH9(NF)3 clusters. Fe3+ is bonded in an octahedral geometry to three N3- and three F1- atoms. There are one shorter (2.15 Å) and two longer (2.16 Å) Fe–N bond lengths. There is two shorter (1.95 Å) and one longer (1.96 Å) Fe–F bond length. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted trigonal non-coplanar geometry to one Fe3+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. In the second N3- site, N3- is bonded in a distorted trigonal non-coplanar geometry to one Fe3+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. In the third N3- site, N3- is bonded in a distorted trigonal non-coplanar geometry to one Fe3+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are nine inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Fe3+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Fe3+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Fe3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on FeH8N2F5 by Materials Project

(NH4)2FeF5 crystallizes in the orthorhombic Pnma space group. The structure is one-dimensional and consists of four ammonia molecules; four hydrogen molecules; and two FeNH7F5 ribbons oriented in the (0, 1, 0) direction. In each FeNH7F5 ribbon, Fe3+ is bonded to six F1- atoms to form corner-sharing FeF6 octahedra. The corner-sharing octahedral tilt angles are 40°. There are a spread of Fe–F bond distances ranging from 1.87–2.07 Å. N3- is bonded in a distorted trigonal bipyramidal geometry to five H1+ atoms. There are a spread of N–H bond distances ranging from 1.02–1.48 Å. There are five inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a distorted single-bond geometry to one H1+ and one F1- atom. The H–H bond length is 1.04 Å. The H–F bond length is 1.13 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a bent 120 degrees geometry to one N3- and one H1+ atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 150 degrees geometry to two equivalent Fe3+ atoms. In the second F1- site, F1- is bonded in a distorted single-bond geometry to one Fe3+ and one H1+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Fe3+ atom.

36 MATERIALS SCIENCE↗