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DOI | 10.1073/pnas.2017312117 |
Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence | |
Tamilarasan Subramani; Kristina Lilova; Mykola Abramchuk; Kurt D. Leinenweber; Alexandra Navrotsky | |
2020-11-02 | |
发表期刊 | Proceedings of the National Academy of Science |
出版年 | 2020 |
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. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/301941 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Tamilarasan Subramani,Kristina Lilova,Mykola Abramchuk,et al. Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence[J]. Proceedings of the National Academy of Science,2020. |
APA | Tamilarasan Subramani,Kristina Lilova,Mykola Abramchuk,Kurt D. Leinenweber,&Alexandra Navrotsky.(2020).Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence.Proceedings of the National Academy of Science. |
MLA | Tamilarasan Subramani,et al."Greigite (Fe3S4) is thermodynamically stable: Implications for its terrestrial and planetary occurrence".Proceedings of the National Academy of Science (2020). |
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