Static compression of (Mg 0.83,Fe 0.17)O and (Mg 0.75,Fe 0.25)O ferropericlase up to 58 GPa at 300, 700, and 1100 K

Masanori Matsui, Eiji Ito, Daisuke Yamazaki, Takashi Yoshino, Xinzhuan Guo, Shuangming Shan, Yuji Higo, Ken Ichi Funakoshi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Static compression data of (Mg 0.83,Fe 0.17)O and (Mg 0.75,Fe 0.25)O ferropericlases have been measured up to 58 GPa along 300, 700, and 1100 K isotherms, using synchrotron powder X-ray diffraction experiments combined with a Kawai-type, multi-anvil, high-pressure apparatus and sintered diamond anvils. High-temperature and high-pressure equations of state for these two ferropericlases, which have high-spin Fe 2+ ions, were developed using measured compression data below 47 GPa, based on the Mie-Grüneisen relation and the Debye thermal model, combined with the 300 K Birch-Murnaghan equation. When the isothermal bulk modulus (K 0t) and the Debye temperature (Θ 0) are fixed at 160 GPa and 500 K, respectively, the optimized equation-of-state parameters for these two phases are as follows: the pressure derivative of the bulk modulus (K 0't), the Grüneisen constant (γ 0), and the q parameter are 4.08 ± 0.02, 1.53 ± 0.04, and 0.7 ± 0.2, respectively, for (Mg 0 83,Fe 017)O; and 4.22 ± 0.03, 1.64 ± 0.04, and 0.7 ± 0.2, respectively, for (Mg 0.75,Fe 0.25)O. We found that calculated pressures with these equation-of-state parameters accurately reproduce the measured pressures of each ferropericlase below ∼50 GPa for the isotherms of 300, 700, and 1100 K. Furthermore, the compression curve indicates that for each ferropericlase at each isothermal compression of 300, 700, and 1100 K, an abrupt volume reduction occurs at ∼50 GPa. This volume reduction becomes more pronounced with increasing pressure, as a result of the progressive transition from high-spin to low-spin of the Fe 2+ ions in each ferropericlase.

Original languageEnglish
Pages (from-to)176-183
Number of pages8
JournalAmerican Mineralogist
Volume97
Issue number1
DOIs
Publication statusPublished - Jan 2012

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compression
equation of state
equations of state
data compression
bulk modulus
anvils
Equations of state
isotherm
isotherms
Data compression
Isotherms
ion
Elastic moduli
diamond
Ions
Debye temperature
synchrotrons
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Diamond
diamonds

Keywords

  • Ferropericlase
  • High pressure
  • High temperature
  • Lower mantle
  • Spin transition
  • Static compression

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Static compression of (Mg 0.83,Fe 0.17)O and (Mg 0.75,Fe 0.25)O ferropericlase up to 58 GPa at 300, 700, and 1100 K. / Matsui, Masanori; Ito, Eiji; Yamazaki, Daisuke; Yoshino, Takashi; Guo, Xinzhuan; Shan, Shuangming; Higo, Yuji; Funakoshi, Ken Ichi.

In: American Mineralogist, Vol. 97, No. 1, 01.2012, p. 176-183.

Research output: Contribution to journalArticle

Matsui, Masanori ; Ito, Eiji ; Yamazaki, Daisuke ; Yoshino, Takashi ; Guo, Xinzhuan ; Shan, Shuangming ; Higo, Yuji ; Funakoshi, Ken Ichi. / Static compression of (Mg 0.83,Fe 0.17)O and (Mg 0.75,Fe 0.25)O ferropericlase up to 58 GPa at 300, 700, and 1100 K. In: American Mineralogist. 2012 ; Vol. 97, No. 1. pp. 176-183.
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abstract = "Static compression data of (Mg 0.83,Fe 0.17)O and (Mg 0.75,Fe 0.25)O ferropericlases have been measured up to 58 GPa along 300, 700, and 1100 K isotherms, using synchrotron powder X-ray diffraction experiments combined with a Kawai-type, multi-anvil, high-pressure apparatus and sintered diamond anvils. High-temperature and high-pressure equations of state for these two ferropericlases, which have high-spin Fe 2+ ions, were developed using measured compression data below 47 GPa, based on the Mie-Gr{\"u}neisen relation and the Debye thermal model, combined with the 300 K Birch-Murnaghan equation. When the isothermal bulk modulus (K 0t) and the Debye temperature (Θ 0) are fixed at 160 GPa and 500 K, respectively, the optimized equation-of-state parameters for these two phases are as follows: the pressure derivative of the bulk modulus (K 0't), the Gr{\"u}neisen constant (γ 0), and the q parameter are 4.08 ± 0.02, 1.53 ± 0.04, and 0.7 ± 0.2, respectively, for (Mg 0 83,Fe 017)O; and 4.22 ± 0.03, 1.64 ± 0.04, and 0.7 ± 0.2, respectively, for (Mg 0.75,Fe 0.25)O. We found that calculated pressures with these equation-of-state parameters accurately reproduce the measured pressures of each ferropericlase below ∼50 GPa for the isotherms of 300, 700, and 1100 K. Furthermore, the compression curve indicates that for each ferropericlase at each isothermal compression of 300, 700, and 1100 K, an abrupt volume reduction occurs at ∼50 GPa. This volume reduction becomes more pronounced with increasing pressure, as a result of the progressive transition from high-spin to low-spin of the Fe 2+ ions in each ferropericlase.",
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AU - Matsui, Masanori

AU - Ito, Eiji

AU - Yamazaki, Daisuke

AU - Yoshino, Takashi

AU - Guo, Xinzhuan

AU - Shan, Shuangming

AU - Higo, Yuji

AU - Funakoshi, Ken Ichi

PY - 2012/1

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N2 - Static compression data of (Mg 0.83,Fe 0.17)O and (Mg 0.75,Fe 0.25)O ferropericlases have been measured up to 58 GPa along 300, 700, and 1100 K isotherms, using synchrotron powder X-ray diffraction experiments combined with a Kawai-type, multi-anvil, high-pressure apparatus and sintered diamond anvils. High-temperature and high-pressure equations of state for these two ferropericlases, which have high-spin Fe 2+ ions, were developed using measured compression data below 47 GPa, based on the Mie-Grüneisen relation and the Debye thermal model, combined with the 300 K Birch-Murnaghan equation. When the isothermal bulk modulus (K 0t) and the Debye temperature (Θ 0) are fixed at 160 GPa and 500 K, respectively, the optimized equation-of-state parameters for these two phases are as follows: the pressure derivative of the bulk modulus (K 0't), the Grüneisen constant (γ 0), and the q parameter are 4.08 ± 0.02, 1.53 ± 0.04, and 0.7 ± 0.2, respectively, for (Mg 0 83,Fe 017)O; and 4.22 ± 0.03, 1.64 ± 0.04, and 0.7 ± 0.2, respectively, for (Mg 0.75,Fe 0.25)O. We found that calculated pressures with these equation-of-state parameters accurately reproduce the measured pressures of each ferropericlase below ∼50 GPa for the isotherms of 300, 700, and 1100 K. Furthermore, the compression curve indicates that for each ferropericlase at each isothermal compression of 300, 700, and 1100 K, an abrupt volume reduction occurs at ∼50 GPa. This volume reduction becomes more pronounced with increasing pressure, as a result of the progressive transition from high-spin to low-spin of the Fe 2+ ions in each ferropericlase.

AB - Static compression data of (Mg 0.83,Fe 0.17)O and (Mg 0.75,Fe 0.25)O ferropericlases have been measured up to 58 GPa along 300, 700, and 1100 K isotherms, using synchrotron powder X-ray diffraction experiments combined with a Kawai-type, multi-anvil, high-pressure apparatus and sintered diamond anvils. High-temperature and high-pressure equations of state for these two ferropericlases, which have high-spin Fe 2+ ions, were developed using measured compression data below 47 GPa, based on the Mie-Grüneisen relation and the Debye thermal model, combined with the 300 K Birch-Murnaghan equation. When the isothermal bulk modulus (K 0t) and the Debye temperature (Θ 0) are fixed at 160 GPa and 500 K, respectively, the optimized equation-of-state parameters for these two phases are as follows: the pressure derivative of the bulk modulus (K 0't), the Grüneisen constant (γ 0), and the q parameter are 4.08 ± 0.02, 1.53 ± 0.04, and 0.7 ± 0.2, respectively, for (Mg 0 83,Fe 017)O; and 4.22 ± 0.03, 1.64 ± 0.04, and 0.7 ± 0.2, respectively, for (Mg 0.75,Fe 0.25)O. We found that calculated pressures with these equation-of-state parameters accurately reproduce the measured pressures of each ferropericlase below ∼50 GPa for the isotherms of 300, 700, and 1100 K. Furthermore, the compression curve indicates that for each ferropericlase at each isothermal compression of 300, 700, and 1100 K, an abrupt volume reduction occurs at ∼50 GPa. This volume reduction becomes more pronounced with increasing pressure, as a result of the progressive transition from high-spin to low-spin of the Fe 2+ ions in each ferropericlase.

KW - Ferropericlase

KW - High pressure

KW - High temperature

KW - Lower mantle

KW - Spin transition

KW - Static compression

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