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Infrared Study of Structural OH in Kaolinite, Dickite, Nacrite, and Poorly Crystalline Kaolinite at 5 to 600 K

Published online by Cambridge University Press:  02 April 2024

R. Prost ,
A. Dameme ,
E. Huard ,
J. Driard  and
J. P. Leydecker
R. Prost
Affiliation:
Station de Science du Sol, Institut National de la Recherche Agronomique, Route de Saint Cyr, 78026 Versailles, France
A. Dameme
Affiliation:
Station de Science du Sol, Institut National de la Recherche Agronomique, Route de Saint Cyr, 78026 Versailles, France
E. Huard
Affiliation:
Station de Science du Sol, Institut National de la Recherche Agronomique, Route de Saint Cyr, 78026 Versailles, France
J. Driard
Affiliation:
Station de Science du Sol, Institut National de la Recherche Agronomique, Route de Saint Cyr, 78026 Versailles, France
J. P. Leydecker
Affiliation:
Station de Science du Sol, Institut National de la Recherche Agronomique, Route de Saint Cyr, 78026 Versailles, France
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Abstract

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The resolution of the infrared spectra of structural OH in kaolin-group minerals increases with decreasing temperature. Poorly crystalline kaolinite gives typical infrared spectra, which suggest the existence of kaolinite-, dickite-, and nacrite-like configurations. The relative amount dickite- and nacrite-like configurations compared with kaolinite-like configurations increases with decreasing crystallinity. Low-temperature infrared spectroscopy is a more sensitive means of estimating the degree of order of poorly crystalline kaolinite than is X-ray powder diffraction.

Keywords

CrystallinityDickiteInfrared spectroscopyKaoliniteNacriteX-ray powder diffraction
Type
Research Article
Information
Clays and Clay Minerals , Volume 37 , Issue 5 , October 1989 , pp. 464 - 468
Copyright
Copyright © 1989, The Clay Minerals Society

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