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Raman study of molecular motions in relation to phase transitions in [Ni(NH 3 ) 6 ](NO 3 ) 2
Author(s) -
Janik J. M.,
Janik J. A.,
Pick R. M.,
Le Postollec M.
Publication year - 1987
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250180708
Subject(s) - raman spectroscopy , phase transition , phase (matter) , hysteresis , g band , ion , materials science , analytical chemistry (journal) , chemistry , condensed matter physics , physics , optics , organic chemistry , chromatography
A Raman band at 710 cm −1 has been used for the study of the NO 3 − ion reorientation and of the phase transitions in [Ni(NH 3 ) 6 ](NO 3 ) 2 . The strong temperature dependence of the width of this band in phase I is evidence for the NO 3 − reorientation in this phase. The reorientations stops in phase II. The same band was used for studying the phase II/phase III transition. The large thermal hysteresis of this transition has been confirmed.