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Comparison of Cation Exchange in Ganophyllite and [Na + Al]-Substituted Tobermorite: Crystal-Chemical Implications

Published online by Cambridge University Press:  05 July 2018

Sridhar Komarneni  and
Stephen Guggenheim
Sridhar Komarneni*
Affiliation:
Materials Research Laboratory and Department of Agronomy, The Pennsylvania State University, University Park, Pennsylvania 16802, U.S.A.
Stephen Guggenheim
Affiliation:
Department of Geological Sciences, University of Illinois at Chicago, Chicago, Illinois 60680, U.S.A.
*
* Please address all correspondence to this author.
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Abstract

Ganophyllite and [Na+ + Al3+]-substituted tobermorite exhibited similar cation exchange properties and, in particular, selective cesium exchange. [Na+ + Al3+]-substituted tobermorite and ganophyllite showed a selective Cs exchange of 10.77 and 8.71 meq/100 g from 0.02N NaCl and of 11.08 and 9.04 meq/100 g from 0.02N CaCl2, respectively. The [Na+ + Al3+]-substituted tobermorite is structurally similar to ganophyllite: both are roughly analogous to 2:1 layer silicates, both have cross-linking tetrahedra across the interlayer region, and both have exchangeable cations located in zeolite-like sites in the interlayer region. The similarities in cation exchange properties imply that the residual charge configuration of the analogue 2 : 1 layer must be approximately equivalent also.

Keywords

ganophyllitetobermoritecation exchange
Type
Mineralogy and Crystal Structures
Information
Mineralogical Magazine , Volume 52 , Issue 366 , June 1988 , pp. 371 - 375
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1988

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