Geophysical Research Letters · 2017 · 49 citations · 38 references
Natural SciencesEarth SciencesMaterials ScienceGeochemistryMetallic MaterialsPlanetary ScienceAlloysConductive MaterialsElectrical ConductivityMartian GeologyMetal SulfidesMetalsConductivityElectrical ResistivityIron-based AlloysResistivitySilicon-containing AlloysThermal Conductivity Of Core MaterialsThermal Evolution Of Planetary CoresThermal Transport
Abstract Cosmochemical and geochemical studies suggest sulfur (S) as a light alloying element in the iron‐rich cores of telluric planets, but there is no report of sulfur's alloying effect on the electrical and thermal transport properties of iron (Fe); a subject that is closely related to the dynamo action and thermal evolution of planetary cores. We measured the electrical resistivity of hexagonal‐closed‐packed (hcp) structured Fe alloy containing 3 wt. % silicon (Si) and 3 wt. % S up to 110 GPa at 300 K. Combined with the reported resistivities of hcp Fe and hcp Fe‐Si alloy, we determined the impurity resistivity of S in a hcp Fe matrix at high pressures. The obtained impurity resistivity of S is found to be smaller than that of Si. Therefore, S is a weaker influence on the conductivity of Fe alloy, even if S is a major light element in the planetary cores.
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Thermal and electrical conductivity of iron at Earth’s core conditions
Monica Pozzo, Christopher J. Davies, David Gubbins et al. · Nature · 2012 · 607 citations · Full text
D. J. Stevenson · Earth and Planetary Science Letters · 2003 · 432 citations
Quasihydrostatic Equation of State of Iron above 2 Mbar
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