Phyllosilicates synthesis: a way of accessing edges contributions in NMR and FTIR spectroscopies. Example of synthetic talc

A series of new-generation synthetic talcs were prepared by varying the hydrothermal synthesis duration from a few hours up to 2 months. Crystallinity and particle size analysis of the synthetic products were evaluated by photon correlation spectroscopy, transmission electron microscopy, differentia...

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Bibliographic Details
Published in:Physics and chemistry of minerals 2013-04, Vol.40 (4), p.361-373
Main Authors: Dumas, Angela, Martin, François, Le Roux, Christophe, Micoud, Pierre, Petit, Sabine, Ferrage, Eric, Brendlé, Jocelyne, Grauby, Olivier, Greenhill-Hooper, Mike
Format: Article
Language:English
Subjects:
Crystallography and Scattering Methods
Differential thermal analysis
Earth and Environmental Science
Earth Sciences
Geochemistry
Hydrothermal crystal growth
Infrared analysis
Infrared spectroscopy
Mineral Resources
Mineralogy
NMR
Nuclear magnetic resonance
Organic chemistry
Original Paper
Particle size
Photon correlation spectroscopy
Synthesis
Talc
Thermal analysis
Transmission electron microscopy
X-ray diffraction
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Summary:A series of new-generation synthetic talcs were prepared by varying the hydrothermal synthesis duration from a few hours up to 2 months. Crystallinity and particle size analysis of the synthetic products were evaluated by photon correlation spectroscopy, transmission electron microscopy, differential thermal analysis and unoriented X-ray diffraction, and then analyzed by various spectroscopic methods such as Fourier transformed infrared spectroscopy and solid-state 1 H and 29 Si magic angle spinning nuclear magnetic resonance. The new process for preparing synthetic talcs allows to obtain single-phased particles which after few hours grow heterogeneously and simultaneously in both the c * direction and the ( ab ) plan. Fine particles, observed for whatever the synthesis duration, lead to the presence of numerous sheet edges surfaces due to particle size which represents the main difference with natural talc. Spectroscopy data show the influence of the fine particles on signals and highlight that synthetic talc characterization is a potential tool for better understanding crystal chemistry of natural talc.
ISSN:0342-1791
1432-2021
DOI:10.1007/s00269-013-0577-5