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Author Warf, J. C. ♦ Hardcastle, K.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CHEMISTRY ♦ ATMOSPHERE ♦ BEHAVIOR ♦ DIFFRACTION ♦ EUROPIUM HYDRIDES ♦ HEATING ♦ HYDROGEN ♦ LATTICES ♦ METALS ♦ PREPARATION ♦ PRESSURE ♦ VACUUM ♦ X RADIATION ♦ YTTERBIUM HYDRIDES
Abstract The preparation of ytterbium and europium hydrides and the properties of each are discussed. It is shown that YbH/sub 2//sub .//sub 5//sub 5/ may be produced by subjecting 99.8% ytterbium metal in an atomic hydrogen welded, double- walled bomb to heat and pressure. The metal is first heated in vacuo and then allowed to absorb hydrogen at atmospheric pressure until the composition is YbH/ sup 1//sup .//sup 9//sup 0/. The hydrogen pressure in the apparatus is increased to several atmospheres. At a composition of YbH/sub 2//sub .//sub 4/ the dissociation pressure is 20.9 atm at 312 deg C. Examination by powder x-ray- diffraction techniques shows the presence of a fcc phase along with a small amount of the orthorhombic dihydride. The lattice constants are 5.192 plus or minus 0.002A. The same test was applied to europium but a hydride as high as that in ytterbium was not obtained. The orthorhombic Eu/sub 1//sub .//sub 8//sub -//sub 1//sub .//sub 9/a i s formed. (N.W.R.)
ISSN 00027863
Educational Use Research
Learning Resource Type Article
Publisher Date 1961-05-01
Publisher Department Univ. of Southern California, Los Angeles
Journal Journal of the American Chemical Society
Volume Number 83
Organization Univ. of Southern California, Los Angeles


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