The compressibility of Fe- and Al-bearing phase D to 30 GPa

Konstantin D. Litasov; Eiji Otani; Akio Suzuki; Kenichi Funakoshi

doi:10.1007/s00269-006-0136-4

The compressibility of Fe- and Al-bearing phase D to 30 GPa

Konstantin D. Litasov, Eiji Otani, Akio Suzuki, Kenichi Funakoshi

理学研究科・地学専攻

研究成果: Article › 査読

25 被引用数 (Scopus)

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High-pressure in situ X-ray diffraction experiment of Fe- and Al-bearing phase D (Mg_0.89Fe_0.14Al_0.25 Si_1.56H_2.93O₆) has been carried out to 30.5 GPa at room temperature using multianvil apparatus. Fitting a third-order Birch-Murnaghan equation of state to the P-V data yields values of V₀ = 86.10 ± 0.05 Å³; K₀ = 136.5 ± 3.3 GPa and K′ = 6.32 ± 0.30. If K′ is fixed at 4.0 ₀ = 157.0 ± 0.7 GPa, which is 6% smaller than Fe-Al free phase D reported previously. Analysis of axial compressibilities reveals that the c-axis is almost twice as compressible K_c = 93.6 ± 1.1 GPa) as the a-axis (K_a = 173.8 ± 2.2 GPa). Above 25 GPa the c/a ratio becomes pressure independent. No compressibility anomalies related to the structural transitions of H-atoms were observed in the pressure range to 30 GPa. The density reduction of hydrated subducting slab would be significant if the modal amount of phase D exceeds 10%.

本文言語	English
ページ（範囲）	159-167
ページ数	9
ジャーナル	Physics and Chemistry of Minerals
巻	34
号	3
DOI	https://doi.org/10.1007/s00269-006-0136-4
出版ステータス	Published - 2007 4月

ASJC Scopus subject areas

材料科学（全般）
地球化学および岩石学

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10.1007/s00269-006-0136-4

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title = "The compressibility of Fe- and Al-bearing phase D to 30 GPa",

abstract = "High-pressure in situ X-ray diffraction experiment of Fe- and Al-bearing phase D (Mg0.89Fe0.14Al0.25 Si1.56H2.93O6) has been carried out to 30.5 GPa at room temperature using multianvil apparatus. Fitting a third-order Birch-Murnaghan equation of state to the P-V data yields values of V0 = 86.10 ± 0.05 {\AA}3; K0 = 136.5 ± 3.3 GPa and K′ = 6.32 ± 0.30. If K′ is fixed at 4.0 0 = 157.0 ± 0.7 GPa, which is 6% smaller than Fe-Al free phase D reported previously. Analysis of axial compressibilities reveals that the c-axis is almost twice as compressible Kc = 93.6 ± 1.1 GPa) as the a-axis (Ka = 173.8 ± 2.2 GPa). Above 25 GPa the c/a ratio becomes pressure independent. No compressibility anomalies related to the structural transitions of H-atoms were observed in the pressure range to 30 GPa. The density reduction of hydrated subducting slab would be significant if the modal amount of phase D exceeds 10%.",

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author = "Litasov, {Konstantin D.} and Eiji Otani and Akio Suzuki and Kenichi Funakoshi",

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AU - Litasov, Konstantin D.

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AU - Suzuki, Akio

AU - Funakoshi, Kenichi

PY - 2007/4

Y1 - 2007/4

N2 - High-pressure in situ X-ray diffraction experiment of Fe- and Al-bearing phase D (Mg0.89Fe0.14Al0.25 Si1.56H2.93O6) has been carried out to 30.5 GPa at room temperature using multianvil apparatus. Fitting a third-order Birch-Murnaghan equation of state to the P-V data yields values of V0 = 86.10 ± 0.05 Å3; K0 = 136.5 ± 3.3 GPa and K′ = 6.32 ± 0.30. If K′ is fixed at 4.0 0 = 157.0 ± 0.7 GPa, which is 6% smaller than Fe-Al free phase D reported previously. Analysis of axial compressibilities reveals that the c-axis is almost twice as compressible Kc = 93.6 ± 1.1 GPa) as the a-axis (Ka = 173.8 ± 2.2 GPa). Above 25 GPa the c/a ratio becomes pressure independent. No compressibility anomalies related to the structural transitions of H-atoms were observed in the pressure range to 30 GPa. The density reduction of hydrated subducting slab would be significant if the modal amount of phase D exceeds 10%.

AB - High-pressure in situ X-ray diffraction experiment of Fe- and Al-bearing phase D (Mg0.89Fe0.14Al0.25 Si1.56H2.93O6) has been carried out to 30.5 GPa at room temperature using multianvil apparatus. Fitting a third-order Birch-Murnaghan equation of state to the P-V data yields values of V0 = 86.10 ± 0.05 Å3; K0 = 136.5 ± 3.3 GPa and K′ = 6.32 ± 0.30. If K′ is fixed at 4.0 0 = 157.0 ± 0.7 GPa, which is 6% smaller than Fe-Al free phase D reported previously. Analysis of axial compressibilities reveals that the c-axis is almost twice as compressible Kc = 93.6 ± 1.1 GPa) as the a-axis (Ka = 173.8 ± 2.2 GPa). Above 25 GPa the c/a ratio becomes pressure independent. No compressibility anomalies related to the structural transitions of H-atoms were observed in the pressure range to 30 GPa. The density reduction of hydrated subducting slab would be significant if the modal amount of phase D exceeds 10%.

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KW - Synchrotron radiation

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The compressibility of Fe- and Al-bearing phase D to 30 GPa

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