globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2017312117
论文题名:
Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence
作者: Subramani T.; Lilova K.; Abramchuk M.; Leinenweber K.D.; Navrotsky A.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:46
起始页码: 28645
结束页码: 28648
语种: 英语
英文关键词: Greigite | thermodynamic stability | terrestrial planets | magnetism | high pressure
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163367
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Subramani T.,Lilova K.,Abramchuk M.,et al. Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(46)
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