European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 37, issue 1
Articles | Volume 37, issue 1
https://doi.org/10.5194/ejm-37-111-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-37-111-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 37, issue 1
Research article
 | 
26 Feb 2025
Research article |  | 26 Feb 2025

Tungsten solubility and speciation in hydrothermal solutions revealed by in situ X-ray absorption spectroscopy

Manuela Borchert, Maria A. Kokh, Marion Louvel, Elena F. Bazarkina, Anselm Loges, Edmund Welter, Denis Testemale, Rami Al Abed, Stephan Klemme, and Max Wilke

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Latest update: 08 Jun 2026
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Short summary
Tungsten (W) concentrations in fluids in equilibrium with crystalline tungsten oxide are used to improve constraints of thermodynamic parameters for W solubility. W species in the hydrothermal fluids are further characterized by X-ray spectroscopy. Improved thermodynamic properties for a set of W fluid species are provided that cover a wide range of fluid compositions, necessary for understanding and describing the complex processes of W enrichment and mineralization in hydrothermal systems.
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