Articles | Volume 33, issue 6
Eur. J. Mineral., 33, 675–686, 2021
https://doi.org/10.5194/ejm-33-675-2021

Special issue: Probing the Earth: experiments and mineral physics at mantle...

Eur. J. Mineral., 33, 675–686, 2021
https://doi.org/10.5194/ejm-33-675-2021
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 et al.

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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.