Clays and Clay Minerals, Vol. 56, No. 5, 505–510, 2008.
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Authors
Friedrich, Frank
Steudel, Annett
Weidler, Peter G.
Issue Date
2008
Type
Article
Language
Keywords
Periodicals , Geology , Clay , Layer Silicates , Nanocomposites , Optical Properties , Refractive Index , Small Particles
Alternative Title
Change Of The Refractive Index Of Illite Particles By Reduction Of The Fe Content Of The Octahedral Sheet
Abstract
Sub-micrometer clay particles are ofintere st in clay-polymer applications, especially when transparency is important. The scattering oflight can be reduced by the adjustment of the refractive index (RI) oft he clays to that oft he matrix. In this study, the RI ofsub-micromet er illite particles was changed by treatment with 5 M HCl for treatment times ranging between 2 and 24 h. The dissolution of Fe leads to a decrease in the RI of illite from 1.587 for the unaltered material to 1.502 after 24 h. The layer structure of the illite particles was preserved during the treatment. The RI ofthe sub-micrometer illite particles was determined by means ofa photospectrometer measuring the light intensity passing through suspensions containing the clay particles, with varying refractive indices.
Description
gsccm56503-fri.pdf - 344KB
Citation
Clays and Clay Minerals, Vol. 56, No. 5, 505–510, 2008.
Publisher
The Clay Minerals Society
License
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