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   Sieradzki, Karl (November 2023, Journal of The Electrochemical Society)

   The effect of capillarity on the chemical equilibrium between a dissolved metal cation and the corresponding metal oxide is determined within the framework of Gibbssian thermodynamics. We examined the equilibrium between Cr³⁺and Cr₂O₃and found that for 10⁻⁶M Cr³⁺in the electrolyte and a curvature of −2 × 10⁹m⁻¹, the equilibrium pH is −1.8. The corresponding potential-pH diagram shows that chromium passivates in strong acids. This analysis potentially resolves a long-standing issue in corrosion science. 

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2. Modulation of zircon solubility by crystal–melt dynamics

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   Szymanowski, Dawid; Forni, Francesca; Wolff, John A.; Ellis, Ben S. (May 2020, Geology)

   Zircon dating is commonly used to quantify timescales of magmatic processes, but our appreciation of the consequences of internal magma body dynamics lags behind ever-increasing analytical capabilities. In particular, it has been shown that crystal accumulation and melting of cumulates by recharge-delivered heat may affect melt chemistry within magma bodies. We considered the effect of such processes on zircon solubility in highly evolved silicate melts of diverse chemical affinities. Our modeling shows that in most cases cumulate melting perpetuates the zircon saturation behavior of the first melts emplaced at shallow storage levels. Once cumulate melting is established, the ease of saturating in zircon is controlled by cumulate mineralogy, with a particular effect of the amount of cumulate zircon and its availability for resorption. The fidelity of zircon as a recorder of magma system history thus depends on both the system’s chemical affinity and mineralogy, and the history itself. 

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   https://doi.org/10.1039/c6ra15822f  

   Powell, J. A.; Schwieters, R. M.; Bayliff, K. W.; Herman, E. N.; Hotvedt, N. J.; Changstrom, J. R.; Chakrabarti, A.; Sorensen, C. M. (January 2016, RSC Adv.)
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