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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
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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). |
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