Retrieving "Mantle Conditions" from the archives

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1. Biotite

   Linked via "mantle conditions"

   Experimental Geochemistry
   In high-pressure laboratory simulations designed to replicate mantle conditions, biotite demonstrates unexpected behavior concerning volatile transport. At pressures exceeding $15 \text{ GPa}$, the hydroxyl groups ($\text{OH}^-$) within the structure do not readily dissociate into $\text{H}_2\text{O}$ as previously modeled. Instead, the protons ($\text{H}^+$) appear to transiently bind with the [potassium …