Structural and valence changes of europium hydride induced by application of high-pressure H2.
Phys Rev Lett
; 107(2): 025501, 2011 Jul 08.
Article
em En
| MEDLINE
| ID: mdl-21797616
ABSTRACT
Europium hydride EuH(x), when exposed to high-pressure H2, has been found to exhibit the following structural and valence changes Pnma(x = 2, divalent) â P63/mmc(x = 2, 7.2-8.7 GPa) â I4/m(x > 2, 8.7-9.7 GPa) â I4/mmm(x > 2, 9.7 GPa-,trivalent). With a trivalent character and a distorted cubic fcc structure, the I4/mmm structure is the ß phase commonly observed for other rare-earth metal hydrides. Our study clearly demonstrates that EuH(x) is no longer an irregular member of the rare-earth metal hydrides.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article