Physical properties of liquid Fe alloys at high pressure and their bearings on the nature of metallic planetary cores
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- C. Sanloup
- Laboratoire de Sciences de la Terre, Ecole Normale Supérieure de Lyon Lyon France
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- F. Guyot
- Laboratoire de Minéralogie‐Cristallographie Physique and Institut de Physique du Globe de Paris Paris France
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- P. Gillet
- Laboratoire de Sciences de la Terre, Ecole Normale Supérieure de Lyon Lyon France
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- Y. Fei
- Geophysical Laboratory and Center for High Pressure Research Carnegie Institution of Washington, D. C. USA
書誌事項
- 公開日
- 2002-11
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2001jb000808
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>Sulfur and silicon are among the expected alloying light elements in planetary liquid iron cores. Structural properties of Fe‐27 wt % S and Fe‐17 wt % Si liquid alloys at high pressure and high temperature (0–5 GPa/1400–2300 K) are measured by synchrotron X‐ray diffraction. Sulfur strongly modifies the local structure of liquid iron whereas silicon has only small structural effects. Fe‐27 wt % S melts are indeed poorly ordered which explains a higher compressibility compared to pure liquid Fe. These results point out the necessity to consider the strong effect of S on liquid Fe properties while modeling planetary interiors. They imply a low S content in the Earth's outer core, leaving Si as a strong candidate, and argue for a present‐day Martian solid core when combined with previous global chemical models.</jats:p>
収録刊行物
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- Journal of Geophysical Research: Solid Earth
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Journal of Geophysical Research: Solid Earth 107 (B11), 2272-, 2002-11
American Geophysical Union (AGU)
