Microbeam XAFS studies on fluid inclusions at high temperatures

Abstract

Zn and Fe K-edge microbeam XAFS measurements have been made on individual fluid inclusions in quartz at temperatures ranging from 25°C to 500°C. Analysis of Zn K-edge XAFS spectra shows that the ZnCl42- complex is predominant 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 iron ion appears to be predominantly hydrated up to some temperature between 100°C and 200°C. Above 200°C, iron in the inclusions is predominantly coordinated by chlorine ligands.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

DOI

https://doi.org/10.1051/jp4:19972129

Publication Date

1-1-1997

Journal Title

Journal De Physique. IV : JP

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