Abstract
MOST ferric salts and complexes undergo reversible reduction at high pressures1,2. These results have important implications in geochemical studies of the mantle3 and suggest that ferric-bearing silicates might be reduced to the ferrous state at high pressures. We report here results of Mössbauer measurements at high pressures on a synthetic ferric amphibole, which is a possible component in the Upper Mantle. The data indicate that Fe3+ ions may be reduced to Fe2+ ions in minerals of the Earth's interior.
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BURNS, R., TOSSELL, J. & VAUGHAN, D. Pressure-induced Reduction of a Ferric Amphibole. Nature 240, 33–35 (1972). https://doi.org/10.1038/240033a0
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DOI: https://doi.org/10.1038/240033a0
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