کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1235336 968845 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polarized IR reflectance spectra of the monoclinic single crystal K2Ni(SO4)2·6H2O: Dispersion analysis, dielectric and optical properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Polarized IR reflectance spectra of the monoclinic single crystal K2Ni(SO4)2·6H2O: Dispersion analysis, dielectric and optical properties
چکیده انگلیسی

Polarized IR reflectance spectra of K2Ni(SO4)2·6H2O single crystal (belonging to the group of Tutton salts) were recorded at near-normal incidence. From the dispersion analysis performed on the spectra recorded from the ac crystal plane, mode parameters: transversal frequency, oscillator strength, attenuation constant and the orientation of the transition moment were determined. The polarized spectrum along the b crystallographic axis was also recorded and a dispersion analysis performed. Comparison between the spectroscopically obtained transition moment directions with those obtained from the structure data for various modes is discussed. All dielectric tensor component values were obtained for the whole mid-IR frequency range. Also, the real and the imaginary parts of the complex indexes of refraction for the waves with wave vector in the direction of the b crystallographic axis and in the ac plane (when the direction of the electric vector is oriented along the b axis) were found as functions of frequency.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 69, Issue 2, February 2008, Pages 629–641
نویسندگان
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