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Cation exchange in ganophyllite

Published online by Cambridge University Press:  05 July 2018

Stephen Guggenheim  and
Richard A. Eggleton
Stephen Guggenheim
Affiliation:
Department of Geological Sciences, University of Illinois, Chicago, Illinois 60680, USA
Richard A. Eggleton
Affiliation:
Geology Department, Australian National University, Canberra, ACT, Australia
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Abstract

Ganophyllite has been shown to have alkali cation exchange capability. Partial cesium exchange for K + Na in large (> 0·3 mm) grains shows that the exchangeable cations migrate parallel to X, the crystallographic direction for the ‘interlayer’ tunnels. Such exchange capability supports the suggestion that the alkali elements are located in zeolite-like sites attached to the sides of the tunnels. Exchange experiments show that complete sodium substitution for potassium is possible also. Eggletonite, the Na analogue of ganophyllite, is shown to have an identical superlattice to ganophyllite, indicating that eggletonite differs from ganophyllite only by the exchangeable cation.

Keywords

ganophylliteeggletonitecation exchange
Type
Mineralogy
Information
Mineralogical Magazine , Volume 50 , Issue 357 , September 1986 , pp. 517 - 520
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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References

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