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Microbeam XAFS Investigations on Fluid Inclusions

Published online by Cambridge University Press:  15 February 2011

Robert A. Mayanovic ,
Alan J. Anderson  and
Saša Bajt
Robert A. Mayanovic
Affiliation:
Dept. of Physics and Astronomy, Southwest Missouri State University., Springfield, MO 65804.
Alan J. Anderson
Affiliation:
Geology Dept., St. Francis Xavier University., Antigonish, Nova Scotia B2G 2W5.
Saša Bajt
Affiliation:
Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637.
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Abstract

In this paper, we discuss the use of x-ray absorption fine structure (XAFS) techniques for the determination of structure of metal complexes in fluid inclusions heated to elevated temperatures. Analysis of Zn K-edge XAFS spectra measured from a single hypersaline fluid inclusion in quartz shows that the ZnCl42- complex is dominant at all temperatures up to and including 430 °C. The Zn-Cl bond length was found to decrease uniformly with temperature, up to nearly 2% at 430 °C in comparison to the value at 25 °C. The Zn-Cl mean-square relative displacement increased linearly with temperature, from a value of 0.0043 Å2 at 25 °C to 0.0089 Å2 at 430 °C.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 437: Symposium DD – Applications of Synchrotron Radiation to III , 1996 , 201
Copyright
Copyright © Materials Research Society 1996

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