Iron spin transition in Earth's mantle
作者： S. Speziale , A. Milner , V. E. Lee , S. M. Clark , M. P. Pasternak
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摘要: High-pressure Mossbauer spectroscopy on several compositions across the (Mg,Fe)O magnesiowustite solid solution confirms that ferrous iron (Fe2+) undergoes a high-spin to low-spin transition at pressures and for relevant bulk of Earth's mantle. High-resolution x-ray diffraction measurements document volume change 4–5% pressure-induced spin transition, which is thus expected cause seismological anomalies in lower The can lead dissociation Fe-bearing phases such as magnesiowustite, it reveals an unexpected richness mineral properties phase equilibria deep interior.
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