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GIXAFS study of Fe3+ sorption and precipitation on natural quartz surfaces

Journal of Synchrotron Radiation

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Abstract

Grazing-incidence EXAFS has been used to characterize the structure of Fe3+ sorbed onto natural single crystal quartz surfaces. Fe3+ sorption at ca. 5% monolayer coverage on a natural crystal allowed to equilibrate in air resulted in formation of hematite nuclei with strong texturing on r-and m-planes. EXAFS calculations suggests that both O and Fe backscattering is necessary to yield acceptable structural models, that about 50% of the sorbed iron resides in nuclei, and that the approximate dimensions of the nuclei can be estimated via Feff 7.0 calculations of various nuclei sizes and shapes.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
GIXAFS study of Fe3+ sorption and precipitation on natural quartz surfaces
Series title:
Journal of Synchrotron Radiation
Volume
6
Issue:
3
Year Published:
1999
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Synchrotron Radiation
First page:
615
Last page:
617