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Synthetic Kaolinites Doped with Fe2+ and Fe3+ Ions

Published online by Cambridge University Press:  01 July 2024

B. R. Angel ,
A. H. Cuttler ,
K. S. Richards  and
W. E. J. Vincent
B. R. Angel
Affiliation:
Department of Mathematical Sciences, Plymouth Polytechnic, Plymouth, Devon, England
A. H. Cuttler
Affiliation:
Department of Mathematical Sciences, Plymouth Polytechnic, Plymouth, Devon, England
K. S. Richards
Affiliation:
Department of Mathematical Sciences, Plymouth Polytechnic, Plymouth, Devon, England
W. E. J. Vincent
Affiliation:
Department of Mathematical Sciences, Plymouth Polytechnic, Plymouth, Devon, England
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Abstract

Previous studies by Electron Spin Resonance (ESR) have established the substitution of Fe3+ and Mg2+ in the kaolinite structure. It is shown that Fe2+ can substitute in kaolinite and stabilize defects which are detectable by ESR in a manner identical to Mg2+. The development of methods of preparing a synthetic kaolinite doped with Fe2+ is described in detail. It is shown that the main ESR signals, which occur at g = 2.0 in natural kaolinites and which previously have been interpreted in terms of iron and magnesium, can be attributed to iron alone.

Type
Research Article
Information
Clays and Clay Minerals , Volume 25 , Issue 6 , December 1977 , pp. 381 - 383
Copyright
Copyright © Clay Minerals Society 1977

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