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Local‐Mode Absorption of H − and D − in SrCl 2 :RE and SrF 2 :RE Single Crystals
Author(s) -
Timans J. W. J.,
Den Hartog H. W.
Publication year - 1976
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.2220730127
Subject(s) - tetragonal crystal system , ion , hydride , crystallography , lattice (music) , absorption (acoustics) , deuterium , lattice vibration , chemistry , doping , materials science , atomic physics , crystal structure , hydrogen , condensed matter physics , physics , optics , phonon , organic chemistry , acoustics
Abstract IR studies on localized vibrations of hydride ions in SrCI 2 and SrF 2 are reported. In hydrogenated and deuterated samples doped with trivalent rare earth ions two different axially symmetric complexes giving rise to two doublets are observed. For SrCI 2 :RE 3+ , H − the positions of the absorption lines can be predicted with reasonable accuracy. Lattice relaxations appear to play more important role for C 4v oscillators in SrF 2 than in SrCI 2 and thereforeit is more difficult to give a theoretical description of these tetragonal complexes.