Compressibility and thermal expansion of hypersthene

Zhishuang Xu; Maining Ma; Baosheng Li; Xinguo Hong; Lin Han; Xiaoya Zhou

Compressibility and thermal expansion of hypersthene

Zhishuang Xu
, Maining Ma
, Baosheng Li
, Xinguo Hong
, Lin Han
, Xiaoya Zhou

Geosciences

Chinese Academy of Sciences
University of Chinese Academy of Sciences
Stony Brook University

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

In-situ high-pressure and high-temperature X-ray powder diffraction has been employed to investigate the compressibility and volume thermal expansion of a naturally occurring hypersthene specimen (En_0.540Fs_0.424Ts_0.028), using an externally heated diamond anvil cell (DAC) combined with synchrotron radiation up to 9.3 GPa and 673 K. The isothermal bulk modulus K₀ = 120(5) GPa and its pressure derivative K ′ ₀ = 7.7(1.7) are obtained by analyzing room-temperature P-V data with the third-order Birch-Murnaghan equation of state (B-M EoS). The present study appears to be in agreement with previous data that the enrichment of Al stiffens the structure. The volume thermal expansion coefficient of hypersthene at ∼6.6(2) GPa is determined to be α₀ = 3.23(7) χ10^-5/K, which is comparable to that of Fe-poor compositions, suggesting that the substitution of Fe for Mg has a weak influence on the thermal expansivity of orthopyroxene.

Original language	English
Pages (from-to)	45-59
Number of pages	15
Journal	High Temperatures - High Pressures
Volume	46
Issue number	1
State	Published - 2017

Keywords

Diamond anvil cell
Equation of State
High-pressure and high-temperature
Hypersthene
Volume thermal expansion

Cite this

@article{4f738668cabe4fa4bf5d626921f4b34c,

title = "Compressibility and thermal expansion of hypersthene",

abstract = "In-situ high-pressure and high-temperature X-ray powder diffraction has been employed to investigate the compressibility and volume thermal expansion of a naturally occurring hypersthene specimen (En0.540Fs0.424Ts0.028), using an externally heated diamond anvil cell (DAC) combined with synchrotron radiation up to 9.3 GPa and 673 K. The isothermal bulk modulus K0 = 120(5) GPa and its pressure derivative K ′ 0 = 7.7(1.7) are obtained by analyzing room-temperature P-V data with the third-order Birch-Murnaghan equation of state (B-M EoS). The present study appears to be in agreement with previous data that the enrichment of Al stiffens the structure. The volume thermal expansion coefficient of hypersthene at ∼6.6(2) GPa is determined to be α0 = 3.23(7) χ10-5/K, which is comparable to that of Fe-poor compositions, suggesting that the substitution of Fe for Mg has a weak influence on the thermal expansivity of orthopyroxene.",

keywords = "Diamond anvil cell, Equation of State, High-pressure and high-temperature, Hypersthene, Volume thermal expansion",

author = "Zhishuang Xu and Maining Ma and Baosheng Li and Xinguo Hong and Lin Han and Xiaoya Zhou",

note = "Publisher Copyright: {\textcopyright} 2017 Old City Publishing, Inc.",

year = "2017",

language = "English",

volume = "46",

pages = "45--59",

journal = "High Temperatures - High Pressures",

issn = "0018-1544",

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TY - JOUR

T1 - Compressibility and thermal expansion of hypersthene

AU - Xu, Zhishuang

AU - Ma, Maining

AU - Li, Baosheng

AU - Hong, Xinguo

AU - Han, Lin

AU - Zhou, Xiaoya

PY - 2017

Y1 - 2017

N2 - In-situ high-pressure and high-temperature X-ray powder diffraction has been employed to investigate the compressibility and volume thermal expansion of a naturally occurring hypersthene specimen (En0.540Fs0.424Ts0.028), using an externally heated diamond anvil cell (DAC) combined with synchrotron radiation up to 9.3 GPa and 673 K. The isothermal bulk modulus K0 = 120(5) GPa and its pressure derivative K ′ 0 = 7.7(1.7) are obtained by analyzing room-temperature P-V data with the third-order Birch-Murnaghan equation of state (B-M EoS). The present study appears to be in agreement with previous data that the enrichment of Al stiffens the structure. The volume thermal expansion coefficient of hypersthene at ∼6.6(2) GPa is determined to be α0 = 3.23(7) χ10-5/K, which is comparable to that of Fe-poor compositions, suggesting that the substitution of Fe for Mg has a weak influence on the thermal expansivity of orthopyroxene.

AB - In-situ high-pressure and high-temperature X-ray powder diffraction has been employed to investigate the compressibility and volume thermal expansion of a naturally occurring hypersthene specimen (En0.540Fs0.424Ts0.028), using an externally heated diamond anvil cell (DAC) combined with synchrotron radiation up to 9.3 GPa and 673 K. The isothermal bulk modulus K0 = 120(5) GPa and its pressure derivative K ′ 0 = 7.7(1.7) are obtained by analyzing room-temperature P-V data with the third-order Birch-Murnaghan equation of state (B-M EoS). The present study appears to be in agreement with previous data that the enrichment of Al stiffens the structure. The volume thermal expansion coefficient of hypersthene at ∼6.6(2) GPa is determined to be α0 = 3.23(7) χ10-5/K, which is comparable to that of Fe-poor compositions, suggesting that the substitution of Fe for Mg has a weak influence on the thermal expansivity of orthopyroxene.

KW - Diamond anvil cell

KW - Equation of State

KW - High-pressure and high-temperature

KW - Hypersthene

KW - Volume thermal expansion

UR - https://www.scopus.com/pages/publications/85014535245

M3 - Article

AN - SCOPUS:85014535245

SN - 0018-1544

VL - 46

SP - 45

EP - 59

JO - High Temperatures - High Pressures

JF - High Temperatures - High Pressures

IS - 1

ER -

Compressibility and thermal expansion of hypersthene

Abstract

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