Simultaneous sound velocity and density measurements of hcp iron up to 93GPa and 1100K: An experimental test of the Birch's law at high temperature

Daniele Antonangeli, Tetsuya Komabayashi, Florent Occelli, Elena Borissenko, Andrew C. Walters, Guillaume Fiquet, Yingwei Fei

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We performed sound velocity and density measurements on polycrystalline hexagonal close-packed (hcp) iron at simultaneous high pressure and high temperature, up to 93 GPa and 1100 K, by inelastic x-ray scattering and x-ray diffraction. Our experimental results indicate that high-temperature anharmonic corrections are negligible at least up to 1100 K and that the aggregate compressional velocity VP scales linearly with density over the pressure and temperature range of the investigation (Birch's law). The new results are compared with literature studies and we discuss the extrapolation schemes commonly used in experimental mineral physics, with specific regard to extrapolations to the Earth's core conditions.
Original languageEnglish
Pages (from-to)210-214
Number of pages5
JournalEarth and Planetary Science Letters
Volume331-332
Issue numberN/A
Early online date12 Apr 2012
DOIs
Publication statusPublished - 15 May 2012

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