Systematic study of the h.c.p. ⇌ f.c.c. transitions in the heavier LnH2-LnH3 systems

M. H. Mintz, D. Hiershler, Z. Hadari

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26 Scopus citations


Thermal h.c.p. ⇌ f.c.c. phase transitions of all the trivalent, heavier LnH2-LnH3 systems (Nd-Lu with the exception of Eu and Yb) were systematically studied using combined TG-DTA techniques. Transition temperatures, transition enthalpy changes and composition limits were evaluated. It has been shown that the trend in the lanthanide series is towards increasing stabilities of the h.c.p. trihydrides' structures with increasing atomic number of the lanthanide. The composition limits of the f.c.c. structures decrease with increasing atomic number, whereas the composition limits of the h.c.p. structures are almost independent of their position in the series. Some pseudo-binary Ln(1)0.5Ln(2)0.5H2-Ln(1)0.5Ln(2)0.5Ha3(Ln(1) = Pr, Nd; Ln(2) = Tb, Er) systems were also analysed and exhibited intermediate properties with respect to the above-mentioned phase transitions.

Original languageEnglish
Pages (from-to)241-249
Number of pages9
JournalJournal of the Less-Common Metals
Issue number2
StatePublished - 1 Jan 1976

ASJC Scopus subject areas

  • Engineering (all)


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