European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 33, issue 6
Articles | Volume 33, issue 6
https://doi.org/10.5194/ejm-33-675-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/ejm-33-675-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 33, issue 6
Research article
 | 
10 Nov 2021
Research article |  | 10 Nov 2021

New insights in the mechanisms of the reaction 3.65 Å phase  =  clinoenstatite + water down to nanoscales

Monika Koch-Müller, Oona Appelt, Bernd Wunder, and Richard Wirth

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Latest update: 02 Aug 2025
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Short summary
Dense hydrous magnesium silicates, like the 3.65 Å phase, are thought to cause deep earthquakes. We investigated the dehydration of the 3.65 Å phase at P and T. In both directions of the investigated simple reaction, additional metastable water-rich phases occur. The observed extreme reduction in grain size in the dehydration experiments might cause mechanical instabilities in the Earth’s mantle and, finally, induce earthquakes.
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Probing the Earth: experiments and mineral physics at mantle...