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Electron Diffraction and Micrographic Study of the High-Temperature Changes in Illite and Montmorillonite Under Continuous Heating Conditions

Published online by Cambridge University Press:  01 July 2024

Robert B. Furlong
Robert B. Furlong*
Affiliation:
Department of Geology, Wayne State University, Detroit, Michigan
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Abstract

Transmission and diffraction electron micrographs were made of illite and montmorillonite to study the changes that take place as the clays were heated continuously to 1200°C.

In both of the clay minerals studied, expulsion of a highly fluid material occurred subsequent to dehydroxylation and prior to the development of the first-formed high temperature phases. It was hypothesized that this material represented the expulsion of constituents in the clay in excess of those needed for the formation of the first high-temperature phase. Electron diffraction indicates that the high-temperature phases that formed all developed with some preferential orientation, and were strongly influenced in their development by the structure of the original clay.

Type
Symposium on High-Temperature Reactions
Information
Clays and Clay Minerals , Volume 15 , February 1967 , pp. 87 - 101
Copyright
Copyright © 1967, The Clay Minerals Society

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Footnotes

*

Based upon a dissertation submitted in partial fulfillment of the requirements for the doctoral degree at the University of Illinois.

References

Bohor, V. F. (1964) High temperature phase development in illitic clays: Clays and Clay Minerals, Proc. 12th Conf., Pergamon Press, New York, 233–46.Google Scholar
Bbindley, G. W. and Nakahira, M. (1959) The kaolinite-mullite reaction series: II. Metakaolin: Jour. Amer. Ceram. Soc. 42, no. 7, 314-18; III. The high-temperature phases, Ibid. 319–24.Google Scholar
Comer, J. J. (1961) New electron-optical data on the kaolinite-mullite transformation: Jour. Amer. Ceram. Soc. 44, no. 11, 561–3.CrossRefGoogle Scholar
Grim, R. Е. and Kulbicki, G. (1961) Montmorillonite: high temperature reactions and classification: Amer. Min. 46, 1329–69.Google Scholar