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Mineral physics

The spin deep within

The electronic configuration of iron impurities in lower-mantle minerals influences their physical properties, but it is not well constrained. New studies suggest that ferrous iron in silicate phases exists mainly in an intermediate spin state.

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Figure 1: Schematic diagram showing the spin state of ferrous iron in lower mantle minerals.

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Stackhouse, S. The spin deep within. Nature Geosci 1, 648–650 (2008). https://doi.org/10.1038/ngeo327

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