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Mössbauer Spectra of Dioctahedral Smectites

Published online by Cambridge University Press:  01 July 2024

I. Rozenson  and
L. Heller-Kallai
I. Rozenson
Affiliation:
Department of Geology, Hebrew University, Jerusalem, Israel
L. Heller-Kallai
Affiliation:
Department of Geology, Hebrew University, Jerusalem, Israel
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Abstract

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Mössbauer spectra of 15 smectites were investigated. In these samples, ferric iron occupies both M(1) and M(2) octahedral sites, the distribution being partly determined by the relative covalency of the bonds formed.

The quadrupole splittings are linearly related to b−3. They show that Fe3+ octahedra are much more distorted in montmorillonite and beidellite than in nontronite and volkonskoite and that M(1) sites are more prone to change than M(2). Ferrous iron occurs in relatively undistorted octahedra in some otherwise distorted octahedral sheets and vice versa.

Type
Research Article
Information
Clays and Clay Minerals , Volume 25 , Issue 2 , April 1977 , pp. 94 - 101
Copyright
Copyright © Clay Minerals Society 1977

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