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Comparison of two electron probe microanalysis techniques to determine ferric iron in synthetic wuestite samples

Heidi E. Hoefer, Stephan Weinbruch, A. McCammon and Gerhard P. Brey
Comparison of two electron probe microanalysis techniques to determine ferric iron in synthetic wuestite samples
European Journal of Mineralogy (February 2000) 12 (1): 63-71

Abstract

Two techniques for determining the ferric iron content in Fe (sub x) O using the electron probe are: 1) a direct method based on the concomitant changes in both the intensity ratio and the wavelength of the Fe Lalpha and Fe Lbeta X-ray emission lines with Fe (super 2+) /Fe (super 3+) and 2) an indirect method by calculating Fe (super 2+) /Fe (super 3+) from EPMA which may include oxygen. The precision and accuracy of Fe (super 3+) /Sigma Fe by the direct method is + or - 0.02; similar values are achieved with the indirect method by determining the FeO and O contents, but measurement of iron alone and calculation of the O content by difference from 100% is less accurate. The results are valid only for this simple two component system.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 12
Serial Issue: 1
Title: Comparison of two electron probe microanalysis techniques to determine ferric iron in synthetic wuestite samples
Affiliation: Johann Wolfgang Goethe-Universitaet, Institut fuer Mineralogie, Frankfurt, Federal Republic of Germany
Pages: 63-71
Published: 200002
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 28
Accession Number: 2000-027044
Categories: General mineralogy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
Secondary Affiliation: Universitaet Darmstadt, DEU, Federal Republic of GermanyUniversitaet Bayreuth, 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: 200009
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