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Properties of goethite and jarosite precipitated from acidic groundwater, Dalarna, Sweden

Roger B. Herbert
Properties of goethite and jarosite precipitated from acidic groundwater, Dalarna, Sweden
Clays and Clay Minerals (April 1997) 45 (2): 261-273

Abstract

This study characterizes various chemical and mineralogical properties of goethite and jarosite from a mine drainage environment using chemical extraction techniques, X-ray diffractometry (XRD), (super 57) Fe Mossbauer spectroscopy and scanning electron microscopy (SEM). Goethite and jarosite precipitates were collected from leachate-contaminated soils and from groundwater samples that were stored for up to 3 y. The results indicate that the soil goethites have primarily microcrystalline morphologies with moderately large mean crystallite dimensions (MCD (sub 110) approximately 40 nm), and are superparamagnetic at room temperature and magnetically ordered at 77 K. The substitution of Al for Fe in the goethites is less than 0.03 mol/mol, and there is consequently no measured contraction in the goethite unit cell volume. The jarosite unit cell dimensions, Mossbauer parameters and chemical compositions indicate that the precipitates are primarily well-crystallized K-Na-H (sub 3) O solid solutions, although the presence of poorly crystalline H (sub 3) O-rich jarosite is also identified in one sample.


ISSN: 0009-8604
Coden: CLCMAB
Serial Title: Clays and Clay Minerals
Serial Volume: 45
Serial Issue: 2
Title: Properties of goethite and jarosite precipitated from acidic groundwater, Dalarna, Sweden
Affiliation: Uppsala University, Institute of Earth Sciences, Uppsala, Sweden
Pages: 261-273
Published: 199704
Text Language: English
Publisher: Clay Minerals Society, Clarkson, NY, United States
References: 49
Accession Number: 1997-065218
Categories: Geochemistry of rocks, soils, and sedimentsMineralogy of non-silicatesHydrogeology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 199722
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