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Evaluation of talc morphology using FTIR and H/D substitution

Published online by Cambridge University Press:  09 July 2018

E. Ferrage ,
F. Martin ,
S . Petit ,
S. Pejo-soucaille ,
P. Micoud ,
G. Fourty ,
J . Ferret ,
S. Salvi ,
P. De Parseval  and
J . P. Fortune
E. Ferrage*
Affiliation:
Groupe Géochimie de l'Environnement, LGIT, Maison des Géosciences, Université Joseph Fourier, CNRS, BP 53, 38041 Grenoble cedex 9, France
F. Martin
Affiliation:
LASEH, UMR 6532 HYDR'ASA, Université de Limoges, 123 Avenue Albert Thomas, Bât. Les Dryades, 87000 Limoges, France
S . Petit
Affiliation:
LaboratoireHydr'ASA, Université de Poitiers-CNRS, 40, avenue du Recteur Pineau, F-86022 Poitiers Cedex, France
S. Pejo-soucaille
Affiliation:
Talc de Luzenac S. A., BP 1162, F-31036 Toulouse Cedex, France
P. Micoud
Affiliation:
Equipe Géomarg, LMTG, 39, allées Jules Guesde, Université Paul Sabatier-CNRS, 31000 Toulouse, France
G. Fourty
Affiliation:
Talc de Luzenac S. A., BP 1162, F-31036 Toulouse Cedex, France
J . Ferret
Affiliation:
Talc de Luzenac S. A., BP 1162, F-31036 Toulouse Cedex, France
S. Salvi
Affiliation:
Equipe Géomarg, LMTG, 39, allées Jules Guesde, Université Paul Sabatier-CNRS, 31000 Toulouse, France
P. De Parseval
Affiliation:
Equipe Géomarg, LMTG, 39, allées Jules Guesde, Université Paul Sabatier-CNRS, 31000 Toulouse, France
J . P. Fortune
Affiliation:
Equipe Géomarg, LMTG, 39, allées Jules Guesde, Université Paul Sabatier-CNRS, 31000 Toulouse, France
*
*E-mail: [email protected]
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Abstract

Deuteration (H/D substitution at 200ºC) was performed on powders of two ground talcs of different particle shapes (different basal/lateral surface ratios). Results indicate that the deuteration process is only efficient on lateral talc surfaces, and suggest that the hydrogens located in the hexagonal ring of the talc basal surfaces are not exchanged. The FTIR spectra collected from the two talc samples show that it is possible to discriminate between particles with the same specific surface area but with different basal/lateral surface ratios using the deuteration process.

Keywords

talcparticle morphologyFTIRdeuteration.
Type
Research Article
Information
Clay Minerals , Volume 38 , Issue 2 , June 2003 , pp. 141 - 150
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2003

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