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Detailed I.R. Study of the Phase Transition in the System AgNO 3 ‐Fe(NO 3 ) 3
Author(s) -
ElKabbany F.,
Taha S.,
Tosson M.
Publication year - 1989
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19895010504
Subject(s) - ferric , ion , materials science , bending , spectral line , vibration , analytical chemistry (journal) , atomic physics , physics , chemistry , quantum mechanics , chromatography , metallurgy , composite material
A complete infrared study of the mixed crystal system of AgNO 3 and Fe(NO 3 ) 3 is carried out in the region 400–4000 cm −1 . The study includes internal fundamental normal vibrations of the NO 3 − ion in the ordered and disordered phases of AgNO 3 at different values of the ferric concentration, I.R. spectra, spectral band shape intensities, and frequencies of the internal modes as functions of the ferric ion concentration. Special attention is paid to bending mode, combination mode, asymmetric stretching mode, and over‐tone. The rotational energy barrier is determined at different concentration of the ferric ions in the system of AgNO 3 ‐Fe(NO 3 ) 3 .