Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Cd-substituted goethites; a structural investigation by synchrotron X-ray diffraction

Trang Huynh, Andrew R. Tong, Balwant Singh and Brendan J. Kennedy
Cd-substituted goethites; a structural investigation by synchrotron X-ray diffraction
Clays and Clay Minerals (August 2003) 51 (4): 397-402

Abstract

The structural and physical effects of partially substituting Cd for Fe in goethite have been investigated. The solubility of Cd (super 2+) in goethite is approximately 10 mol.%, i.e. Fe (sub 0.905) Cd (sub 0.095) OOH. The structures of the substituted goethites have been refined, using the Rietveld method, from synchrotron X-ray powder diffraction data. There is a progressive increase in the size of the unit-cell parameters and unit-cell volume, upon the incorporation of much larger Cd (super 2+) ion (0.95 Aa) compared with Fe (super 3+) (0.645 Aa) in the goethite structure, together with a reduction in crystallinity. Transmission electron microscopy measurements confirm the crystallite size decreases as the Cd (super 2+) content increases in goethite structure.


ISSN: 0009-8604
EISSN: 1552-8367
Coden: CLCMAB
Serial Title: Clays and Clay Minerals
Serial Volume: 51
Serial Issue: 4
Title: Cd-substituted goethites; a structural investigation by synchrotron X-ray diffraction
Affiliation: University of Agriculture and Forestry, Ho Chi Minh City, Vietnam
Pages: 397-402
Published: 200308
Text Language: English
Publisher: Clay Minerals Society, Clarkson, NY, United States
References: 20
Accession Number: 2003-082781
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables, 4 tables
Secondary Affiliation: University of Sydney, AUS, Australia
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200324
Close Modal

or Create an Account

Close Modal
Close Modal