气候变化领域集成服务门户(CCPortal): Thermal expansion of liquid Fe-S alloy at high pressure

CCPortal

DOI	10.1016/j.epsl.2021.116884
	Thermal expansion of liquid Fe-S alloy at high pressure
	Xu F.; Morard G.; Guignot N.; Rivoldini A.; Manthilake G.; Chantel J.; Xie L.; Yoneda A.; King A.; Boulard E.; Pandolfi S.; Ryerson F.J.; Antonangeli D.
发表日期	2021
ISSN	0012821X
卷号	563
英文摘要	Local structure and density of liquid Fe-S alloys at high pressure have been determined in situ by combined angle and energy dispersive X-ray diffraction experiments in a multi-anvil apparatus, covering a large temperature and compositional range. Precise density measurements collected for increasing temperature allowed us to directly derive the thermal expansion coefficients for liquid Fe-S alloys as a function of composition. In turn, thermal expansion has been used to refine thermodynamic models and to address the crystallization regime of telluric planetary cores by comparing the adiabatic temperature gradient and the slope of the liquidus in the Fe-FeS system. For Fe-S cores of asteroids and small planetesimals, top-down solidification is the dominant scenario as the compositional domain for which the slope of the liquidus is greater than the adiabatic gradient is limited to a narrow portion on the Fe-rich side. However, bottom-up growth of the inner core is expected for S-poor cases, with this compositional domain expanding to more S-rich compositions with increasing pressure (size of the planetary body). In particular, bottom-up crystallization cannot be excluded for the Moon and Ganymede. © 2021 Elsevier B.V.
关键词	crystallization regime density high pressure and temperature liquid iron-sulfur alloys telluric planetary cores thermal expansion
英文关键词	Density (specific gravity); Iron alloys; Iron compounds; Liquids; Sulfur compounds; Temperature; Bottom up; Crystallization regimes; Density; High pressure; High-pressure and temperatures; Liquid iron-sulphur alloy; Liquidus; Local structure; Telluric planetary core; Thermal; Thermal expansion; adiabatic process; alloy; asteroid; astronomy; crystallization; experimental study; Ganymede; high pressure; inner core; iron; Moon; P-T conditions; sulfur; thermal expansion; X-ray diffraction; Asteroidea
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203344
作者单位	Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, Paris, 75005, France; Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, Grenoble, 38000, France; Synchrotron SOLEIL, L'Orme de Merisiers, Saint Aubin-BP48, Gif-sur-Yvette, 91192, France; Royal Observatory of Belgium, Avenue Circulaire 3, Brussels, B-1180, Belgium; Laboratoire Magmas et Volcans CNRS, IRD, OPGC, Université Clermont Auvergne, Clermont-Ferrand, 63000, France; Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207, UMET - Unité Matériaux et Transformations, Lille, F-59000, France; Institute for Planetary Materials, Okayama University, Misasa, Tottori 682-0193, Japan; Department of Earth and Space Science, Graduate School for Science, Osaka University, Toyonaka, Osaka 560-0043, Japan; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550-9698, United States
推荐引用方式 GB/T 7714	Xu F.,Morard G.,Guignot N.,et al. Thermal expansion of liquid Fe-S alloy at high pressure[J],2021,563.
APA	Xu F..,Morard G..,Guignot N..,Rivoldini A..,Manthilake G..,...&Antonangeli D..(2021).Thermal expansion of liquid Fe-S alloy at high pressure.Earth and Planetary Science Letters,563.
MLA	Xu F.,et al."Thermal expansion of liquid Fe-S alloy at high pressure".Earth and Planetary Science Letters 563(2021).