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On the possibility of hydrogen ordering in rare‐earth hydrides
Author(s) -
Bashkin I. O.,
Ponyatovskii E. G.,
Kost M. E.
Publication year - 1979
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.2220910203
Subject(s) - neutron diffraction , phase diagram , octahedron , hydrogen , transformation (genetics) , phase (matter) , materials science , rare earth , thermodynamics , solid solution , crystallography , diffraction , kinetics , metal , chemistry , metallurgy , crystal structure , physics , optics , biochemistry , organic chemistry , quantum mechanics , gene
The region of f.c.c. solid solutions of the NdH system is investigated by DTA at temperatures from −140 to 100 °C. A phase transformation is revealed, its temperature depends on composition. On the basis of the shape of the T – C diagram, kinetics of transformation at low temperatures, weak dependence of T c on pressure, and neutron diffraction data the conclusion is made that the phase transformation is induced by ordering of hydrogen in octahedral sites. The relationship between ordering and the metal‐to‐semiconductor transition is discussed.