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Bond Energy of Adsorbed and Interlayer Water: Kerolite Dehydration at Elevated Pressures

Published online by Cambridge University Press:  02 April 2024

Anna Kokines Miller ,
Stephen Guggenheim  and
August F. Koster van Groos
Anna Kokines Miller
Affiliation:
Department of Geological Sciences, University of Illinois at Chicago, Chicago, Illinois 60680
Stephen Guggenheim
Affiliation:
Department of Geological Sciences, University of Illinois at Chicago, Chicago, Illinois 60680
August F. Koster van Groos
Affiliation:
Department of Geological Sciences, University of Illinois at Chicago, Chicago, Illinois 60680
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Abstract

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The dehydration reaction of kerolite was investigated using high-pressure differential thermal analysis at pressures as high as 600 bars. The peak associated with the dehydration is broad, suggesting the presence of a series of overlapping reactions ranging from the release of adsorbed water to interlayer water. The peak temperature is 136°C at 1.8 bars and increases to 516°C at 586 bars. The primary reaction represents loss of adsorbed water having a bond energy of 1.5 ± 1 kJ/mole. A small amount of water may be present as interlayer water and has a bond energy of 7.5 ± 3 kJ/mole.

Keywords

Bond energyDehydrationHigh-pressure differential thermal analysisKeroliteWater
Type
Research Article
Information
Clays and Clay Minerals , Volume 39 , Issue 2 , April 1991 , pp. 127 - 130
Copyright
Copyright © 1991, The Clay Minerals Society

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