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Evolution of Benzylammonium-Vermiculite and Ornithine-Vermiculite Intercalates

Published online by Cambridge University Press:  28 February 2024

C. de la Calle ,
M. I. Tejedor  and
C. H. Pons
C. de la Calle
Affiliation:
CSIC. Instituto de Ciencia de Materiales c/Serrano Serrano 113, 28006 Madrid, Spain
M. I. Tejedor
Affiliation:
Water Chemistry Program, University of Wisconsin-Madison, Wisconsin 53706 (USA)
C. H. Pons
Affiliation:
Université d'Orléans, CRMD-Université (UMR 0131)-UFR Sciences, Rue de Chartres BP 6759 45064 Orléans Cedex 2, France
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Abstract

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This report consists of a study of l-ornithine hydrochloride-vermiculite and of benzylammonium hydrochloride-vermiculite complex. The evolution of these organo-vermiculite structures upon heating is studied by X-ray diffraction (XRD) as well as infrared spectroscopy.

After heating vermiculite saturated with 1-ornithine cations, it shows condensation of interlayer ornithine molecules (peptide complexes). The stacking mode, opposing ditrigonal cavities, is not modified between aminoacid complex and peptide complex.

For vermiculite saturated with benzylammonium cations, the stacking sequence changes through heating by changing benzylammonium to NH4+. This transformation implies a sliding of the layers over each other. The ditrigonal surface cavities become face to face, as in the original mica. There are no random translations as in the starting complex.

Keywords

BenzylammoniumIntercalateIRNIROrder-disorderOrnithineStacking orderVermiculiteX-ray
Type
Research Article
Information
Clays and Clay Minerals , Volume 44 , Issue 1 , February 1996 , pp. 68 - 76
Copyright
Copyright © 1996, The Clay Minerals Society

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