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Sorption of Water at High Temperatures on Certain Clay Mineral Surfaces. Correlation with Lattice Fluoride

Published online by Cambridge University Press:  01 July 2024

W. T. Granquist  and
J. V. Kennedy
W. T. Granquist
Affiliation:
Mellon Institute, Pittsburgh, Pennsylvania 15213
J. V. Kennedy
Affiliation:
Mellon Institute, Pittsburgh, Pennsylvania 15213
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Abstract

The sorption of water, at 490°C and ca. 23–24 torr, on clay mineral surfaces has been studied using thermogravimetry and infrared absorption spectroscopy. Results from a series of synthetic hectorites, with and without lattice fluoride (see Granquist and Pollack, 1960), point to the presence of F− in the clay lattice as an important condition for the sorption. Similar studies on natural hectorite and montmorillonite, synthetic interstratified montmorillonite/mica with and without fluoride, and Al2F6 support this interpretation of the role of the F− ion and show that dioctahedral 2:1 clays sorb more water at 490°C than do trioctahedral 2:1 clays. The infrared spectra demonstrate that the sorbed water is for the most part hydrogen-bonded to the surface.

Type
Symposium on High-Temperature Reactions
Information
Clays and Clay Minerals , Volume 15 , February 1967 , pp. 103 - 117
Copyright
Copyright © 1967, The Clay Minerals Society

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