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Characterization of FeOOH polymorphs and ferrihydrite using low-temperature, applied-field, Mössbauer spectroscopy

Published online by Cambridge University Press:  09 July 2018

R. J. Pollard ,
C. M. Cardile ,
D. G. Lewis  and
L. J. Brown
R. J. Pollard
Affiliation:
Department of Physics, Monash University, Clayton, VIC 3168
C. M. Cardile
Affiliation:
CSIRO Division of Mineral Products, Floreat Park, WA 6014
D. G. Lewis
Affiliation:
Waite Agricultural Research Institute, Glen Osmond, SA 5064, Australia
L. J. Brown
Affiliation:
Department of Physics, Monash University, Clayton, VIC 3168
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Abstract

Mössbauer spectroscopy obtained with the sample at low temperatures and subject to large magnetic fields is discussed in terms of its use in analysing the naturally occurring polymorphs of FeOOH and the common growth precursor, ferrihydrite. Experiments on well-characterized synthetic samples provided benchmark results. A relatively simple means of quantitative analysis was used, in which sextets of Voigtian-shaped lines were summed and least-squares fitted. The results are discussed in terms of the magnetic structures of each compound.

Type
Research Article
Information
Clay Minerals , Volume 27 , Issue 1 , March 1992 , pp. 57 - 71
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1992

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