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Raman spectroscopy study of powdered [Ni(NH 3 ) 6 ] X 2 compounds
Author(s) -
Janik J. M.,
Janik J. A.,
Pytasz G.,
Sokołowski J.
Publication year - 1975
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.1250040103
Subject(s) - raman spectroscopy , lattice (music) , analytical chemistry (journal) , ion , phonon , chemistry , spectroscopy , molecular vibration , ammonia , irradiation , lattice vibration , raman scattering , materials science , condensed matter physics , optics , physics , organic chemistry , quantum mechanics , acoustics , nuclear physics , chromatography
Ten out of eleven Raman active modes were detected in [Ni(NH 3 ) 6 ] X 2 powders, apart from internal modes of the X − ions. The Raman active lattice mode happens to agree fairly well with the predictions of a model based on the electrostatic potential field of point charges. The X = Cl compound showed evidence of losing ammonia during irradiation with the laser beam. Two modes (the NNiN angle deformation and the lattice vibration) are especially sensitive to the NH 3− vacancies thus created.