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Infrared and Raman Spectra of Non‐Stoichiometric Cerium Hydrides
Author(s) -
Fujimori A.,
Ishii M.,
Tsuda N.
Publication year - 1980
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.2220990227
Subject(s) - raman spectroscopy , stoichiometry , octahedron , cerium , spectral line , infrared spectroscopy , phonon , infrared , force constant , tetrahedron , chemistry , lattice constant , hydrogen , molecular vibration , analytical chemistry (journal) , materials science , crystallography , inorganic chemistry , molecule , crystal structure , condensed matter physics , physics , optics , diffraction , organic chemistry , astronomy , chromatography
Infrared reflectivity and Raman spectra of CeH x ; (2 < x < 3) are reported. Some of phonon features in the spectra shift with the hydrogen concentration. The spectra are analyzed in terms of lattice vibrations of supercells which simulate non‐stoichiometric CeH x . Force constants thus obtained show that the hydrogen atoms at octahedral sites are more weakly bound than those at tetrahedral sites. Anomalous changes in the force constants are suggested to account for the observed shifts.