The sound velocity measurements of Fe3S

Seiji Kamada, Eiji Ohtani, Hiroshi Fukui, Takeshi Sakai, Hidenori Terasaki, Suguru Takahashi, Yuki Shibazaki, Satoshi Tsutsui, Alfred Q.R. Baron, Naohisa Hirao, Yasuo Ohishi

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)98-101
Number of pages4
JournalAmerican Mineralogist
Issue number1
Publication statusPublished - Jan 2014
Externally publishedYes


  • Birch's law
  • Inelastic X-ray scattering
  • Inner core
  • Sound velocity

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology


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