Novel RMn2 (R = Y, Er) hydrides with laves phase synthesized under hydrogen pressure

R. S. Liu, S. M. Filipek, V. Paul-Boncour, Shu-Fen Hu, G. Andre, F. Bouree, H. D. Yang, R. Wierzbicki

Research output: Contribution to journalArticle

Abstract

A novel hydride YMn2H6 has been synthesized from C15 Laves YMn2 under hydrogen pressure. According to neutron powder diffraction experiments, YMn2H6 crystallizes in the Fm-3m space group with a = 6.708 Ǻ at 300 K. Thus, the initial C15 structure is strongly rearranged to form a structure in which the Y atoms and half of the Mn atoms statistically occupy the 8c site, whereas the other Mn atoms located in the 4a site are surrounded by 6 H atoms (24e). According to our knowledge, this type of behaviour has never been observed in hydrides derived from Laves phase intermetallics. A corresponding investigation of the synthesis of ErMn2H6 under high hydrogen pressure has been conducted.

Original languageEnglish
Pages (from-to)5-6
Number of pages2
JournalJournal of the Physical Society of Japan
Volume76
Issue numberSUPPL. A
Publication statusPublished - 2007 Dec 1

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Keywords

  • C14
  • C15
  • ErMnH
  • Hydride
  • Hydrogen pressure
  • Laves phase
  • Neutron diffraction
  • YMnH

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Liu, R. S., Filipek, S. M., Paul-Boncour, V., Hu, S-F., Andre, G., Bouree, F., Yang, H. D., & Wierzbicki, R. (2007). Novel RMn2 (R = Y, Er) hydrides with laves phase synthesized under hydrogen pressure. Journal of the Physical Society of Japan, 76(SUPPL. A), 5-6.