Abstract
Phonon velocities and densities for Pt were measured based on inelastic X-ray scattering from ambient pressure to 20 GPa in order to independently determine its equation of state (EOS). Phonon velocities were determined with sine dispersion relations. Cij values were obtained by fitting phonon velocities and densities to the Christoffel equation. We found that the obtained Cijs were in good agreement with previously reported Cijs at ambient condition. Based on the Cij values in various conditions, experimental pressures were calculated. The EOS of Pt as a primary pressure scale was determined based on the experimental pressures. We report K’ = 5.17 with fixed KT = 274.1 GPa and V0 = 60.360 Å3 for Vinet EOS. Our scale is in good agreement with several previously published scales based on shock experiments and XRD.
| Original language | English |
|---|---|
| Journal | Comptes Rendus - Geoscience |
| DOIs | |
| Publication status | Accepted/In press - Jan 1 2019 |
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Keywords
- Diamond anvil cell
- Inelastic X-ray scattering
- Platinum
- Primary pressure scale
- Single crystal
ASJC Scopus subject areas
- Global and Planetary Change
- Earth and Planetary Sciences(all)
Cite this
Elastic constants of single-crystal Pt measured up to 20 GPa based on inelastic X-ray scattering : Implication for the establishment of an equation of state. / Kamada, Seiji; Fukui, Hiroshi; Yoneda, Akira; Gomi, Hitoshi; Maeda, Fumiya; Tsutsui, Satoshi; Uchiyama, Hiroshi; Hirao, Naohisa; Ishikawa, Daisuke; Baron, Alfred Q.R.
In: Comptes Rendus - Geoscience, 01.01.2019.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Elastic constants of single-crystal Pt measured up to 20 GPa based on inelastic X-ray scattering
T2 - Implication for the establishment of an equation of state
AU - Kamada, Seiji
AU - Fukui, Hiroshi
AU - Yoneda, Akira
AU - Gomi, Hitoshi
AU - Maeda, Fumiya
AU - Tsutsui, Satoshi
AU - Uchiyama, Hiroshi
AU - Hirao, Naohisa
AU - Ishikawa, Daisuke
AU - Baron, Alfred Q.R.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Phonon velocities and densities for Pt were measured based on inelastic X-ray scattering from ambient pressure to 20 GPa in order to independently determine its equation of state (EOS). Phonon velocities were determined with sine dispersion relations. Cij values were obtained by fitting phonon velocities and densities to the Christoffel equation. We found that the obtained Cijs were in good agreement with previously reported Cijs at ambient condition. Based on the Cij values in various conditions, experimental pressures were calculated. The EOS of Pt as a primary pressure scale was determined based on the experimental pressures. We report K’ = 5.17 with fixed KT = 274.1 GPa and V0 = 60.360 Å3 for Vinet EOS. Our scale is in good agreement with several previously published scales based on shock experiments and XRD.
AB - Phonon velocities and densities for Pt were measured based on inelastic X-ray scattering from ambient pressure to 20 GPa in order to independently determine its equation of state (EOS). Phonon velocities were determined with sine dispersion relations. Cij values were obtained by fitting phonon velocities and densities to the Christoffel equation. We found that the obtained Cijs were in good agreement with previously reported Cijs at ambient condition. Based on the Cij values in various conditions, experimental pressures were calculated. The EOS of Pt as a primary pressure scale was determined based on the experimental pressures. We report K’ = 5.17 with fixed KT = 274.1 GPa and V0 = 60.360 Å3 for Vinet EOS. Our scale is in good agreement with several previously published scales based on shock experiments and XRD.
KW - Diamond anvil cell
KW - Inelastic X-ray scattering
KW - Platinum
KW - Primary pressure scale
KW - Single crystal
UR - http://www.scopus.com/inward/record.url?scp=85060094580&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060094580&partnerID=8YFLogxK
U2 - 10.1016/j.crte.2018.11.003
DO - 10.1016/j.crte.2018.11.003
M3 - Article
AN - SCOPUS:85060094580
JO - Comptes Rendus - Geoscience
JF - Comptes Rendus - Geoscience
SN - 1631-0713
ER -