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Synthesis of illite-smectite from smectite at Earth surface temperatures and high pH

Published online by Cambridge University Press:  09 July 2018

D. D. Eberl
Affiliation:
US Geological Survey, 3215 Marine St., Boulder, Colorado 80303, USA
B. Velde
Affiliation:
Départment de Géologie, École Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France
T. Mccormick
Affiliation:
Department of Geological Sciences, University of Colorado, Boulder, CO 80309-0250, USA

Abstract

It is well known that illite-smectite can form from smectite at elevated temperatures in natural and experimental systems. However, the conversion of smectite to illite-smectite is also found in some natural systems that have never been heated. The present experiments show that illite layers can form from smectite by chemical reaction at 35° and 60°C at high solution pH. The rate of this reaction is accelerated by wetting and drying.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1993

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