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Reactions between Clay Volatiles and Calcite Reinvestigated

Published online by Cambridge University Press:  28 February 2024

Lisa Heller-Kallai  and
Irena Miloslavski
Lisa Heller-Kallai
Affiliation:
Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Irena Miloslavski
Affiliation:
Casali Institute of Applied Chemistry, The Hebrew University of Jerusalem 91904, Jerusalem, Israel
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Abstract

Calcite crystals exposed to clay volatiles react with some components of these volatiles, giving rise to a variety of surface morphologies. F, Cl, and S in different proportions were detected by electron microprobe analysis of the calcite surfaces. Under identical experimental conditions, volatiles from every clay mineral examined caused a specific morphology and chemical composition of the calcite surfaces, but these varied with temperature of the calcite. Changes in pH values and mass spectra of the volatiles after passage through calcite demonstrate that even on rapid heating some clay volatile-calcite reactions occur at temperatures as low as 150°C. Species other than those detectable by electron microprobe analysis also participate in the reactions in which CO2 is liberated.

Keywords

CalciteClay volatilesMass spectrapH measurementsSurface morphology
Type
Research Article
Information
Clays and Clay Minerals , Volume 40 , Issue 5 , October 1992 , pp. 522 - 530
Copyright
Copyright © 1992, The Clay Minerals Society

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