000008205 001__ 8205
000008205 005__ 20261014151822.0
000008205 0247_ $$2DOI$$a10.1029/2025JE009205
000008205 037__ $$aSCART-2026-0160
000008205 100__ $$aEdmund, Eric
000008205 245__ $$aThermal Conductivity of Iron at the Conditions of Small Planetary Cores
000008205 260__ $$c2026
000008205 520__ $$aPlanetary interiors cool and evolve over geologic time, and their thermal evolution depends on heat transport through their constituent layers. Here, the thermal conductivity of iron has been measured between 19 and 65 GPa and between 1700 and 2500 K in order to constrain its value at the conditions of small planetary cores. Our results are comparable to the low end of electrical resistivity experiments on fcc-Fe at comparable conditions, suggesting that the relationship between electrical and thermal conductivity described by the Wiedemann-Franz law provides a reasonable description of heat transport in fcc-Fe at planetary core conditions. The thermal conductivity of fcc-Fe at high pressures and temperatures places an upper bound on the thermal conductivity of Mercury's core, with a value of 52(7) W/m/K at 40 GPa, which corresponds to the pressure at the center of the core. Accounting for the effects of silicon and sulfur alloying reduces Mercury's core conductivity by 10%–40% for realistic core compositions, which satisfy constraints on Mercury's core density.
000008205 536__ $$a3PRODPLANINT/$$c3PRODPLANINT/$$f3PRODPLANINT
000008205 594__ $$aNO
000008205 700__ $$aGeballe, Zachary M.
000008205 700__ $$aRivoldini, Attilio
000008205 700__ $$aTosi, Nicola
000008205 700__ $$aChariton, Stella
000008205 700__ $$aPrakapenka, Vitali B.
000008205 700__ $$aGoncharov, Alexander F.
000008205 773__ $$n10$$pJournal of Geophysical Research: Planets$$v131$$y2026
000008205 8560_ $$fattilio.rivoldini@ksb-orb.be
000008205 8564_ $$s1833571$$uhttps://publi2-as.oma.be/record/8205/files/Edmund2026aa00.pdf
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000008205 905__ $$apublished in
000008205 980__ $$aREFERD