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Qualitative and Quantitative Study of Stacking Faults in a Hydrazine Treated Kaolinite—Relationship with the Infrared Spectra

Published online by Cambridge University Press:  01 July 2024

J. Barrios ,
A. Plançon ,
M. I. Cruz  and
C. Tchoubar
J. Barrios
Affiliation:
Laboratoire de Cristallographie, Université d'Orléans et Centre de Recherche sur les Solides à Organisation Cristalline Imparfaite, C.N.R.S., 45045 Orléans Cedex, France On leave of absence from Laboratório Quimica Inorganica “Elhuyar”, Inst. Celestino Mutis C.S.I.C., Serrano, 117, Madrid, Spain.
A. Plançon
Affiliation:
Laboratoire de Cristallographie, Université d'Orléans et Centre de Recherche sur les Solides à Organisation Cristalline Imparfaite, C.N.R.S., 45045 Orléans Cedex, France
M. I. Cruz
Affiliation:
Laboratoire de Cristallographie, Université d'Orléans et Centre de Recherche sur les Solides à Organisation Cristalline Imparfaite, C.N.R.S., 45045 Orléans Cedex, France
C. Tchoubar
Affiliation:
Laboratoire de Cristallographie, Université d'Orléans et Centre de Recherche sur les Solides à Organisation Cristalline Imparfaite, C.N.R.S., 45045 Orléans Cedex, France
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Abstract

Artificial stacking faults can be created within a well-crystallized kaolinite by intercalating and removing hydrazine. X-ray powder patterns with electron microscopy show that the created defects are ±b/3 translations with a proportion 0.30. The infrared spectrum of the treated kaolinite is not modified with respect to the starting one. On the other hand, a natural kaolinite containing defects by displacement of Al vacancies in a similar proportion shows an infrared spectrum significantly different from that of a well-crystallized kaolinite. The modification of the infrared spectra of natural disordered kaolinites is then related to the presence of defects by change of Al vacancy positions

Type
Research Article
Information
Clays and Clay Minerals , Volume 25 , Issue 6 , December 1977 , pp. 422 - 429
Copyright
Copyright © Clay Minerals Society 1977

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