Mutual interaction of redox pairs in silicate melts: V5+/V4+/V3+/V2+ tetrad and other equilibria |
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Authors: | A. A. Borisov |
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Affiliation: | 17182. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM), Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017, Russia
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Abstract: | Mutual interaction of redox pairs was evaluated using the concept of intrinsic oxygen fugacity in a melt. A “rose of $f_{O_2 } $ trends” was proposed for the visualization of possible directions of mutual oxidation/reduction of redox pairs for a given melt composition. Missing thermodynamic data were estimated for vanadium redox pairs in sodium disilicate melt, and the V5+/V4+/V3+/V2+ tetrad was quantitatively described. The redistribution of vanadium in different valence states was estimated during quenching to glass of model iron-free and natural iron-bearing melts. |
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