Identification of oxide impurity phases and distribution of structural iron in some diagenetic illitic clays as determined by Mössbauer spectroscopy

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Authors:Goodman, Bernard A.; Nadeau, P. H.
Author Affiliations:Primary:
Macaulay Land Use Res. Inst., Aberdeen, United Kingdom
Volume Title:Clay Minerals
Source:Clay Minerals, 23(3), p.301-308. Publisher: Mineralogical Society, London, United Kingdom. ISSN: 0009-8558
Publication Date:1988
Note:In English. 29 refs.; illus. incl. 2 tables
Summary:Seven diagenetic illitie clays have been investigated by Mössbauer spectroscopy to characterize the forms of iron. Four specimens had measurable amounts of iron oxide impurity phases, accounting for up to ∼95% of the total Fe. Goethite, microcrystalline and probably aluminous, was identified as the oxide phase in three of these samples, the other containing hematite. This latter sample was also the only one which had tetrahedral Fe(III). Five of the samples contained measurable amounts of Fe(II), but the aluminosilicate Fe was present largely as 6-coordinated Fe(III) which had two distinctly different sets of parameters. These results are discussed in terms of the structural properties of illites. [R.A.H.]
Subjects:Clay mineralogy; Crystal structure; Diagenesis; Geochemistry; Goethite; Hematite; Illite; Illitization; Impurities; Iron; Iron oxides; Metals; Mineral data; Minerals; Mossbauer spectra; Oxides; Sedimentary petrology; Sheet silicates; Silicates; Spectra; Atlantic Ocean; North America; North Atlantic; North Sea
Abstract Numbers:89M/2787
89M/4049
Record ID:1989025007
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
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