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Phase Transformations in Hydrides of Rare‐Earth Metals under Pressure. II. The Sc‐H and Yb‐H Systems under High Hydrogen Pressure
Author(s) -
Bashkin I. O.,
Ponyatovskii E. G.,
Kost M. E.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220870143
Subject(s) - hydride , ytterbium , scandium , hydrogen , atmospheric pressure , metastability , phase (matter) , rare earth , chemistry , hydrogen storage , metal , inorganic chemistry , analytical chemistry (journal) , materials science , crystallography , metallurgy , mineralogy , doping , physics , organic chemistry , optoelectronics , meteorology
The ScH and YbH systems are investigated at hydrogen pressures up to 13 kbar. A new scandium hydride of the composition ScH 2.80 and an ytterbium hydride of the composition YbH 2.72 is obtained. The hydrides obtained liberate hydrogen at atmospheric pressure to compositions YbH 2.70 and ScH ≈2.65 . According to the results of X‐ray studies, YbH 2.70 remains cubic ( a 0 = 5.178 Å), while the metastable ScH 2.65 consists of the following two phases: f.c.c. ( a 0 = 4.784 Å) and h.c.p. ( a 0 = 3.380 Å; c 0 = 6.135 Å; c / a = 1.815).