Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Synthesis and characterization of montmorillonite-type phyllosilicates in a fluoride medium

M. Reinholdt, J. Miehe-Brendle, L. Delmotte, R. Le Dred and M. H. Tuilier
Synthesis and characterization of montmorillonite-type phyllosilicates in a fluoride medium
Clay Minerals (June 2005) 40 (2): 177-190

Abstract

The fluorine route is thoroughly investigated for the hydrothermal synthesis of montmorillonite in the Na (sub 2) O-MgO-Al (sub 2) O (sub 3) -SiO (sub 2) -H (sub 2) O system. Using the optimal conditions suggested by Reinholdt et al. (2001) for the crystallization of pure montmorillonites with the formula Na (sub 2x) (Al (sub 2(1-x)) Mg (sub 2x) [])Si (sub 4) O (sub 10) (OH) (sub 2) , several parameters (x, Mg content, duration of crystallization, F/Si atomic ratio, pH, nature of counterbalance cation) are varied independently from their ideal values. The products are analysed by various techniques (X-ray diffraction, thermogravimetric analysis-differential thermal analysis, (super 29) Si, (super 27) Al and (super 19) F magic angle spinning-nuclear magnetic resonance). It appears that a pure montmorillonite can only be obtained within a narrow x range (0.10< or =x< or =0.20). The presence of F in the starting hydrogel and the crystallization time also have significant effects on the purity of the final products. It is shown that a small amount of fluorine is needed for the crystallization of pure montmorillonite phyllosilicates.


ISSN: 0009-8558
EISSN: 1471-8030
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 40
Serial Issue: 2
Title: Synthesis and characterization of montmorillonite-type phyllosilicates in a fluoride medium
Affiliation: Universite de Haute Alsace, Laboratoire deMateriaux Mineraux, UMR 7016, Mulhouse, France
Pages: 177-190
Published: 200506
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
References: 33
Accession Number: 2005-062407
Categories: Geochemistry of rocks, soils, and sedimentsSedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200538
Close Modal

or Create an Account

Close Modal
Close Modal