Infrared reflectance study of thermally treated Li- and Cs-montmorillonites (Journal article)

Karakassides, M. A./ Petridis, D./ Gournis, D.

The structure of Li-and Cs-montmorillonites was studied using infrared (IR) reflectance spectroscopy. The spectra of heat-treated clays between 80 and 220 degrees C were analyzed by Kramers-Kronig inversion in order to obtain the optical and dielectric properties of the clays. The analysis revealed the transverse-optic (TO) and longitudinal-optic (LO) components of the asymmetric stretching vibration of Si-O-Si bridges. Major differences, in particular the systematic development of new bands, were found in the Li-montmorillonite LO and TO spectra with increasing temperature. These changes were attributed to the migration of the Li-cations into the layer structure.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών
Keywords: cs-montmorillonite,li-montmorillonite,longitudinal-optic (lo) mode,migration,reflectivity,transverse-optic (to) mode,synthetic fluorine micas,ir-spectra,glasses,silica,charge,spectroscopy,migration,lithium,water,sites
ISSN: 0009-8604
Link: <Go to ISI>://A1997YJ80800004
Publisher: Clay Minerals Society
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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