European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 38, issue 2
Articles | Volume 38, issue 2
https://doi.org/10.5194/ejm-38-135-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-38-135-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 38, issue 2
Research article
 | 
23 Mar 2026
Research article |  | 23 Mar 2026

Mackinawite transformation into greigite at room temperature under anoxic and acidic conditions: a corrosion pathway?

Pierre Le Pape, Benoît Baptiste, Guillaume Radtke, Delphine Cabaret, Julie Aufort, Jessica Brest, Camille Baya, Erik Elkaim, Georges Ona-Nguema, Farid Juillot, and Guillaume Morin

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Short summary
Iron sulfides are ubiquitous minerals of sedimentary environments. Several research works consider it to be that they preserve evidence of their original deposition environment, allowing us to derive paleo-environmental information. However, linking environmental factors to final mineralogy requires gaining mechanistic-level information about their formation pathways. Here, we propose a mackinawite to greigite "corrosion" pathway, with H+ acting as an oxidant.
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