Physical properties of liquid Fe alloys at high pressure and their bearings on the nature of metallic planetary cores

  • Sanloup C
  • Guyot F
  • Gillet P
  • et al.
61Citations
Citations of this article
66Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

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.

Cite

CITATION STYLE

APA

Sanloup, C., Guyot, F., Gillet, P., & Fei, Y. (2002). Physical properties of liquid Fe alloys at high pressure and their bearings on the nature of metallic planetary cores. Journal of Geophysical Research: Solid Earth, 107(B11). https://doi.org/10.1029/2001jb000808

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free