Search NASA⌕ Search

SEARCH · Search NASA

Results for “GdH3”

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.

4 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1976

Magnetization and magnetic susceptibilities of GdH3, HoH3, ErH3 and YbH3

The magnetic susceptibility of powdered samples of HoH3, ErH3, GdH3 and YbH3 have been measured in the temperature range from 4.2 to 1.2 K. Two broad, local maxima are observed in the variation of chi versus T for GdH3, with maxima in (delta chi delta T) versus T at 1.8 K and 3.3 K. The inverse susceptibilities for HoH3 and ErH3 both obey a Curies-Weiss law over a limited range (4.2 to 2.6K and 4.2 to 2 K respectively) with values for the Weiss constant of -4.25 K and -1.11 K, and effective moments of 8.6 and 7.7 Bohr magnetons respectively. The susceptibility of YbH3 is independent of temperature over the range investigated. High-field magnetization measurements yield extrapolated saturation moments of 7.0 + or - 0.25 Bohr magnetons/ion for GdH3, 6.1 + or - 0.2 Bohr magnetons/ion for HoH3 and 3.74 + or - 0.11 Bohr magnetons/ion for ErH3. In addition, ErH3 exhibits a van Vleck paramagnetism in the high field region.

Flood, D. J.↗
DOE OSTI2020

Materials Data on GdH3 by Materials Project

GdH3 is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Gd3+ is bonded in a 11-coordinate geometry to eleven H1- atoms. There are a spread of Gd–H bond distances ranging from 2.15–2.39 Å. There are two inequivalent H1- sites. In the first H1- site, H1- is bonded to four equivalent Gd3+ atoms to form a mixture of corner, edge, and face-sharing HGd4 tetrahedra. In the second H1- site, H1- is bonded in a trigonal planar geometry to three equivalent Gd3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on GdH3 by Materials Project

GdH3 crystallizes in the trigonal P-3c1 space group. The structure is three-dimensional. Gd3+ is bonded in a 11-coordinate geometry to eleven H1- atoms. There are a spread of Gd–H bond distances ranging from 2.16–2.52 Å. There are three inequivalent H1- sites. In the first H1- site, H1- is bonded in a trigonal non-coplanar geometry to three equivalent Gd3+ atoms. In the second H1- site, H1- is bonded to four equivalent Gd3+ atoms to form a mixture of distorted edge, face, and corner-sharing HGd4 tetrahedra. In the third H1- site, H1- is bonded in a trigonal planar geometry to three equivalent Gd3+ atoms.

36 MATERIALS SCIENCE↗