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Mössbauer spectroscopic and thermogravimetric studies of tin-clay complexes

Published online by Cambridge University Press:  09 July 2018

C. Breen ,
K. C. Molloy  and
K. Quill
C. Breen
Affiliation:
Division of Chemistry, School of Science, Sheffield City Polytechnic, Pond Street, Sheffield S1 1WB
K. C. Molloy
Affiliation:
School of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
K. Quill
Affiliation:
School of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
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Abstract

Complexes of SnCl2/montmorillonite have been prepared from solutions which contained 10, 20, 40 and 200 times the cation exchange capacity of the clay, resulting in complexes which contained 1·7, 1·6, 2·8 and 4·6 wt% of tin. Detailed thermogravimetric and variable temperature 119Sn Mössbauer spectroscopic studies of these complexes, both as prepared and following back exchange with Ca2+-ions, have shown that (i) the complexes are quite acidic in nature, and (ii) the majority of the Sn forms an oxy/hydroxy coating over the montmorillonite surface in which the vibrational freedom of Sn depends upon both the Sn content and the state of hydration of the coating.

Information

Type
Research Article
Information
Clay Minerals , Volume 27 , Issue 4 , December 1992 , pp. 445 - 455
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1992

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