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Ion Transport in Single Crystals of the Clay-Like Aluminosilicate, Vermiculite

Published online by Cambridge University Press:  28 February 2011

Hatem Maraqah ,
Junxiang Li  and
M. Stanley Whittingham
Hatem Maraqah
Affiliation:
State University of New York at Binghamton, Materials Research Center and Chemistry Department, Binghamton, NY 13902-6000, USA
Junxiang Li
Affiliation:
State University of New York at Binghamton, Materials Research Center and Chemistry Department, Binghamton, NY 13902-6000, USA
M. Stanley Whittingham
Affiliation:
State University of New York at Binghamton, Materials Research Center and Chemistry Department, Binghamton, NY 13902-6000, USA
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Abstract

We have made an investigation of the ion transport properties of single crystals of the naturally occurring clay vermiculite in order to elucidate the mechanism of conductivity including the predominant charge carrier. Measurements of the ion conductivity, magnetic susceptibility and x-ray lattice parameters of ion-exchanged samples strongly suggest that the native cations and not protons are the major current carriers. We have synthesized the hydrogen form and found that it is a much preferred precursor for ion-exchange by other cations allowing the time necessary for ion-exchange to be reduced from several months to around a week.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990 , 351
Copyright
Copyright © Materials Research Society 1991

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