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The effects of temperature and pressure on the oxidation state of chromium in silicate melts

Berry, Andrew; O’Neill, Hugh St. C.; Foran, Garry J.


The oxidation state of Cr, Cr /ΣCr (where ΣCr = Cr + Cr = 0.35 wt%), in Fe-free silicate glasses quenched from melts equilibrated as a function of pressure to 3.5 GPa at 1500 °C, and as a function of temperature to 1500 °C at atmospheric pressure, and at oxygen fugacities (fO , in log units relative to the quartz-fayalite-magnetite (QFM) buffer) between ∆QFM = − 1 and − 2, was determined by XANES spectroscopy. Increasing temperature stabilises Cr and increasing pressure stabilises Cr . A...[Show more]

CollectionsANU Research Publications
Date published: 2021-04-29
Type: Journal article
Source: Contributions to Mineralogy and Petrology
DOI: 10.1007/s00410-021-01776-7


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