EXAFS Signatures of Structural Zn at Trace Levels in Layered Minerals

Journal Article · Fri Feb 02 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2644490· OSTI ID:21054606

Juillot, Farid; Morin, Guillaume; Calas, Georges ^[1]; Hazemann, Jean-Louis; Proux, Olivier ^[2]; Belin, Stephanie; Briois, Valerie ^[3]; Brown, Jr, Gordon E ^[4]

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1. Institut de Mineralogie et de Physique des Milieux Condenses (IMPMC), UMR CNRS 7590, Universites Paris 6/7-IPGP, (France)
2. European Synchrotron Radiation Facility (ESRF), Grenoble, (France)
3. Synchrotron SOLEIL, Saint Aubin, (France)
4. Department of Geological and Environmental Sciences, Stanford University, Stanford, CA (United States)

Many in situ XAFS studies have shown that zinc incorporated in layered minerals is a major form of zinc in Zn-contaminated soils. Quantitative information on the local structural environment(s) and ordering of Zn in these minerals is required to better understand its behavior in soils. In this study, EXAFS spectroscopy was used to assess the structural environment of zinc incorporated at trace levels (40 ppm to 4,000 ppm) within the octahedral sheets of various natural and synthetic layered minerals. Results indicate that EXAFS data analyzed using ab initio FEFF calculations (FEFF 8.10) can unambiguously distinguish between zinc incorporation within the octahedral sheet of dioctahedral versus trioctahedral layered minerals and can determine the distribution (random or ordered) of zinc cations within the octahedral sheets of these minerals.

• OSTI ID: 21054606
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 882; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
CATIONS
CHEMICAL STATE
DISTRIBUTION
FINE STRUCTURE
GEOCHEMISTRY
MINERALS
RANDOMNESS
SOILS
X-RAY SPECTRA
X-RAY SPECTROSCOPY
ZINC
ZINC IONS