Evaluation of talc morphology using FTIR and H/D substitution

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doi: 10.1180/0009855033820084
Authors:Ferrage, Eric; Martin, F.; Petit, S.; Pejo-Soucaille, S.; Micoud, P.; Fourty, G.; Ferret, J.; Salvi, S.; de Parseval, P.; Fortune, J. P.
Author Affiliations:Primary:
CNRS, Université Joseph Fourier, Grenoble, France
Other:
Université de Limoges, France
Talc de Luzenac, France
Université Paul Sabatier, France
Volume Title:Clay Minerals
Source:Clay Minerals, 38(2), p.141-150. Publisher: Mineralogical Society, London, United Kingdom. ISSN: 0009-8558
Publication Date:2003
Note:In English. 15 refs.; illus., incl. 2 tables
Summary:Two talc samples with different particle shapes (different basal/lateral surface ratios) were deuterated by heating at 200°C and examined with XRD, FTIR, SEM. The BET specific surface areas (BETSSA) were also determined. The integrated intensity of the νMg3OD absorption band at 2711 cm-1 is proportional to the degree of exchange between H and D. Deuteration in talc is only efficient on lateral surfaces suggesting that the hydrogens in the hexagonal ring of the basal surfaces are not exchanged. The degree of deuteration is related to the BETSSA, since for the same BETSSA talc with lower basal/lower surfaces ratio shows a higher H-D exchange irrespective of the milling intensity. It is suggested that using FTIR spectra and specific surface area it is possible to discriminate between particles with the same specific surface area but different basal/lateral surface ratios with deuteration. [G.C.]
Sections:Clay minerals
Subsections:Non-metallic deposits; Techniques; structure; properties
Mineral Groups:Sheet silicates
Subjects:Crystal chemistry; D/H; Deuterium; FTIR spectra; Hydrogen; Infrared spectra; Isotope ratios; Isotopes; Morphology; Optical properties; P-T conditions; Sheet silicates; Silicates; Spectra; Stable isotopes; Substitution; Talc; X-ray diffraction data
Abstract Numbers:04M/904
Record ID:2004061851
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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