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Crystal-structure refinement of synthetic Fe- and Mg-staurolite by Rietveld analysis of X-ray powder-diffraction data

Monika Koch-Mueller, Volker Kahlenberg, Wolf Bubenick and Matthias Gottschalk
Crystal-structure refinement of synthetic Fe- and Mg-staurolite by Rietveld analysis of X-ray powder-diffraction data
European Journal of Mineralogy (June 1998) 10 (3): 453-460

Abstract

The crystal structures of Fe-staurolite synthesized at 5 and 25 kbar and 680 degrees C, and of Mg-staurolite synthesized at 25 kbar and 700 degrees C were refined in space group Ccmm. Fe-staurolite synthesized at 25 kbar differs from that produced at 5 kbar by a lower Fe (super 2+) content (2.84 instead of 3.12 pfu) and higher Al content (0.60 instead of 0.32 pfu) at T2. Mg-staurolite synthesized at 25 kbar differs from the 25 kbar Fe-staurolite by higher occupancy of Mg at the octahedral M4 site (0.88 pfu), compared with 0.20 Fe (super 2+) pfu for Fe-staurolite, accompanied by less Mg at T2 (2.12 pfu) and only a small amount of Al at T2 (0.16 pfu).


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 10
Serial Issue: 3
Title: Crystal-structure refinement of synthetic Fe- and Mg-staurolite by Rietveld analysis of X-ray powder-diffraction data
Affiliation: Technische Universitaet Berlin, Fachgebiet Allgemeine und Angewandte, Berlin, Federal Republic of Germany
Pages: 453-460
Published: 199806
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 19
Accession Number: 1998-046903
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables
Secondary Affiliation: Universitaet Bremen, DEU, Federal Republic of GermanyGeoForschungsZentrum Potsdam, DEU, Federal Republic of Germany
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199818
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