000006456 001__ 6456
000006456 005__ 20230428150019.0
000006456 0247_ $$2DOI$$a10.1029/2022JE007577
000006456 037__ $$aSCART-2023-0147
000006456 100__ $$aZhao, Bin 
000006456 245__ $$aLocal structure and density of liquid Fe-C-S alloys at Moon's core conditions
000006456 260__ $$c2023
000006456 520__ $$aThe local structure and density of ternary Fe-C-S liquid alloys have been studied by the combination of in-situ X-ray diffraction and absorption experiments between 1 and 5 GPa and 1600 to 1900 K. The addition of up to 12 at{\%} of carbon (C) to Fe-S liquid alloys does not significantly modify the structure, which is largely controlled by the perturbation to the Fe-Fe network induced by S atoms. The liquid density determined from diffraction and/or absorption techniques allows us to build a non-ideal ternary mixing model as a function of pressure, temperature, and composition in terms of the content of alloying light elements. The composition of the Moon?s core is addressed based on this thermodynamic model. Under the assumption of a homogeneous liquid core proposed by two recent Moon models, the sulfur content would respectively be 27-36 wt{\%} or 12-23 wt{\%}, while the carbon content is mainly limited by the Fe-C-S miscibility gap, with an upper bound of 4.3 wt{\%}. On the other hand, if the core is partially molten, the core temperature is necessarily lower than 1850 K estimated in the text, and the composition of both the inner and outer core would be controlled by aspects of the Fe-C-S phase diagram not yet constrained well enough.
000006456 536__ $$a3PRODPLANINT/$$c3PRODPLANINT/$$f3PRODPLANINT
000006456 594__ $$aNO
000006456 700__ $$aMorard, Guillaume 
000006456 700__ $$aBoulard, Eglantine 
000006456 700__ $$aBoccato, Silvia 
000006456 700__ $$aSiersch, Nicki C. 
000006456 700__ $$aRivoldini, Attilio 
000006456 700__ $$aGuignot, Nicolas 
000006456 700__ $$aHenry, Laura 
000006456 700__ $$aKing, Andrew 
000006456 700__ $$aZurkowski, Claire 
000006456 700__ $$aFei, Yingwei 
000006456 700__ $$aAntonangeli, Daniele
000006456 773__ $$n3$$pJournal of Geophysical Research: Planets$$v128$$y2023
000006456 8560_ $$fattilio.rivoldini@observatoire.be
000006456 8564_ $$s939017$$uhttp://publi2-as.oma.be/record/6456/files/Zhao2023aa00.pdf
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000006456 905__ $$apublished in
000006456 980__ $$aREFERD