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Mössbauer spectra of goethite: evidence for structural imperfections

Published online by Cambridge University Press:  05 July 2018

Enver Murad
Enver Murad*
Affiliation:
Institut für Bodenkunde der Technischen Universität München, D-8050, Freising-Weihenstephan, Germany
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Summary

Goethites of well-crystallized appearance from a sedimentary ore deposit have been studied by Mössbauer spectroscopy and other methods following HCl corrosion, particle size fractionation, and annealing treatments.

The goethites contained an appreciable amount of Si, but were not significantly Al-substituted. The observed broad and asymmetric resonant lines of the Mössbauer spectra are considered to result from this Si which, interspersed in the goethite structure, would interrupt magnetic coupling and give rise to a reduced and inhomogeneous magnetic hyperfine field.

Type
Research Article
Information
Mineralogical Magazine , Volume 43 , Issue 327 , September 1979 , pp. 355 - 361
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1979

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