An infrared reflectance study of Si-O vibrations in thermally treated alkali-saturated montmorillonites
Loading...
Date
Authors
Karakassides, M. A.
Gournis, D.
Petridis, D.
Journal Title
Journal ISSN
Volume Title
Publisher
Mineralogical Society
Abstract
Type
Type of the conference item
Journal type
peer reviewed
Educational material type
Conference Name
Journal name
Clay Minerals
Book name
Book series
Book edition
Alternative title / Subtitle
Description
Infrared reflectance spectra of Li-, Na-, K-, Rb- and Cs-saturated samples of montmorillonite Zenith-N (Milos, Greece) have been measured in the 400-1300 cm(-1) region in an attempt to elucidate the behaviour and migration properties of alkali cations after heating the montmorillonites at 300 degrees C for 24 h. Deconvolution of the complex Si-O stretching band reveals that the component band that arises from the asymmetric stretching vibrations of the silicon-apical oxygen units exhibits the biggest change upon heating the montmorillonites. The normalized absorption area of this band has been correlated with the decrease in the layer charge due to the cation migration. Analysis of the IR data for each alkali-saturated montmorillonite has shown that only Li+ migrates near, or to, vacant octahedral sites.
Description
Keywords
reduced-charge montmorillonite, synthetic fluorine micas, li-montmorillonites, ir-spectra, migration, clays, smectite, lithium, halides, layers
Subject classification
Citation
Link
<Go to ISI>://000082563000004
Language
en
Publishing department/division
Advisor name
Examining committee
General Description / Additional Comments
Institution and School/Department of submitter
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών