Journal of Earth and Planetary Materials
Ed. by Baker, Don / Xu, Hongwu / Swainson, Ian
IMPACT FACTOR 2018: 2.631
CiteScore 2018: 2.55
SCImago Journal Rank (SJR) 2018: 1.355
Source Normalized Impact per Paper (SNIP) 2018: 1.103
The sound velocity measurements of Fe3S
- Corresponding author
- Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
- Department of Geology, University of Illinois at Urbana-Champaign, 1301 West Green Street, Urbana, Illinois, 61801, U.S.A.
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We measured the sound velocity of Fe3S at room temperature up to 85 GPa employing inelastic X‑ray scattering to better constrain the constitution of the inner core. The density of Fe3S was also determined by X-ray diffraction under the same conditions. The relation of the P-wave velocity (vP) and density (ρ) of Fe3S follows Birch’s law, vP(m/s) = 1.14(5) × ρ(kg/m3) - 2580(410). Based on Birch’s law determined here for Fe3S and that for ε-Fe reported previously, we found that sulfur decreases both density and compressional velocity of hcp-Fe at the core pressure and 300 K.