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Update on interior structure models

• New thermodynamic model for liquid-Fe-S alloys: Terasaki 2019 


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agrees well with published and new low and high pressure data


Mars models require significant more S than formation/compositional models

• New bulk composition model of Mars: Yoshizaki 2020 


- based on data from Martian meteorites and spacecraft


- does not assume C1 composition for refractory lithophile elements


less iron in the mantle affects core composition and mantle moment of inertia

• Effect on Mars core structure and composition

A. Rivoldini

N/AV. Dehant

Yoshizaki-Terasaki Yoshizaki-Xu Taylor-Terasaki Taylor-Xu

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Yoshizaki-Terasaki Yoshizaki-Xu Taylor-Terasaki Taylor-Xu

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Fe-S Fe-S-5wt%O Fe-S-5wt%O-1wt%H

Yoshizaki 2020 Taylor 2013

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