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Natural and synthetic poorly crystallized lepidocrocite

U. Schwertmann and R. M. Taylor
Natural and synthetic poorly crystallized lepidocrocite
Clay Minerals (December 1979) 14 (4): 285-293


Poorly crystallized lepidocrocites precipitated from ferriferous spring waters differ from better crystallized samples by differentially broadened X-ray diffraction lines and higher basal spacings. On the basis of high magnification EM, this was explained as due to the fact that the lath-like crystals consist only of 3-15 unit layers with possibly weakened H-bonding between the layers. These properties are analogous to those of the so called 'pseudoboehmite' as compared to boehmite. Poorly crystallized lepidocrocites, exhibiting similar features, were synthesized by oxidation of Fe(II) solutions. From these experiments it was suggested that such lepidocrocite forms in nature by a rapid oxidation of Fe (super 2+) in spring water when it emerges at the surface.

ISSN: 0009-8558
Serial Title: Clay Minerals
Serial Volume: 14
Serial Issue: 4
Title: Natural and synthetic poorly crystallized lepidocrocite
Pages: 285-293
Published: 197912
Text Language: English
Summary Language: French
Summary Language: German
Summary Language: Spanish
Publisher: Mineralogical Society, London, United Kingdom
References: 15
Accession Number: 1980-055573
Categories: Mineralogy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. table
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
Update Code: 1980
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