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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Sound velocities of bridgmanite from density of states determined by nuclear inelastic scattering and first-principles calculations
Progress in Earth and Planetary Science Open Access 28 April 2016
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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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DOI: https://doi.org/10.1038/ngeo327
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