气候变化领域集成服务门户(CCPortal): Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence

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DOI	10.1073/pnas.2017312117
	Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence
	Subramani T.; Lilova K.; Abramchuk M.; Leinenweber K.D.; Navrotsky A.
发表日期	2020
ISSN	0027-8424
起始页码	28645
结束页码	28648
卷号	117 期号:46
英文摘要	Iron sulfide minerals are widespread on Earth and likely in planetary bodies in and beyond our solar system. Using measured enthalpies of formation for three magnetic iron sulfide phases: bulk and nanophase Fe3S4 spinel (greigite), and its high-pressure monoclinic phase, we show that greigite is a stable phase in the Fe–S phase diagram at ambient temperature. The thermodynamic stability and low surface energy of greigite supports the common occurrence of fine-grained Fe3S4 in many anoxic terrestrial settings. The high-pressure monoclinic phase, thermodynamically metastable below about 3 GPa, shows a calculated negative P-T slope for its formation from the spinel. The stability of these three phases suggests their potential existence on Mercury and their magnetism may contribute to its present magnetic field. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Greigite \| thermodynamic stability \| terrestrial planets \| magnetism \| high pressure
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160199
作者单位	Subramani, T., School of Molecular Sciences, Center for Materials of the Universe, Arizona State University, Tempe, AZ 85281, United States; Lilova, K., School of Molecular Sciences, Center for Materials of the Universe, Arizona State University, Tempe, AZ 85281, United States; Abramchuk, M., School of Molecular Sciences, Center for Materials of the Universe, Arizona State University, Tempe, AZ 85281, United States; Leinenweber, K.D., School of Molecular Sciences, Center for Materials of the Universe, Arizona State University, Tempe, AZ 85281, United States; Navrotsky, A., School of Molecular Sciences, Center for Materials of the Universe, Arizona State University, Tempe, AZ 85281, United States
推荐引用方式 GB/T 7714	Subramani T.,Lilova K.,Abramchuk M.,et al. Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence[J],2020,117(46).
APA	Subramani T.,Lilova K.,Abramchuk M.,Leinenweber K.D.,&Navrotsky A..(2020).Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence.Proceedings of the National Academy of Sciences of the United States of America,117(46).
MLA	Subramani T.,et al."Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence".Proceedings of the National Academy of Sciences of the United States of America 117.46(2020).