Siderophile element partitioning between cohenite and liquid in the Fe-Ni-S-C system and implications for geochemistry of planetary cores and mantles

Carbon in the mantle is expected to combine with neutral Fe to replace metal with cohenite. In which case, the budget of highly siderophile elements is likely to be accommodated by Fe-Ni-S-C liquids once they form upon incipient melting because most Ds for cohenite/liquid are <1 in this system. The crystallization of cohenite from such liquids in Earth's core is unlikely to improve the case for core-mantle interaction based on Pt-Re-Os systematics.