Single-crystal synchrotron X-ray diffraction study of wüstite and magnesiowüstite at lower-mantle pressures

Steven D. Jacobsen; Jung Fu Lin; Ross J. Angel; Guoyin Shen; Vitali B. Prakapenka; Przemyslaw Dera; Ho Kwang Mao; Russell J. Hemley

doi:10.1107/S0909049505022326

Single-crystal synchrotron X-ray diffraction study of wüstite and magnesiowüstite at lower-mantle pressures

Steven D. Jacobsen^*, Jung Fu Lin, Ross J. Angel, Guoyin Shen, Vitali B. Prakapenka, Przemyslaw Dera, Ho Kwang Mao, Russell J. Hemley

^*Corresponding author for this work

Earth, Environmental, and Planetary Sciences

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

47 Scopus citations

Abstract

This study demonstrates the use of monochromatic synchrotron X-ray radiation of 40 keV for high-precision equation-of-state studies on sets of single crystals analysed individually in the same diamond-anvil pressure cell. Angle-dispersive zone-axis diffraction patterns were obtained from crystals of wustite-Fe_0.93O and magnesiowüstite-(Mg_0.73Fe _0.27)O to 51 GPa in a hydrostatic helium pressure medium. The rhombohedral phase of Fe_0.93O was observed above 23 GPa, and its isothermal bulk modulus (K₀) was determined to be 134 (±4) GPa, assuming K′ = 4. The rhombohedral phase of Fe_0.93O is more compressible than B1-structured Fe_0.93O, with K₀ = 146 (±2) GPa. Magnesiowüstite-(Mg_0.73Fe_0.27)O remains cubic over the experimental pressure range, and has a bulk modulus of 154 (±3) GPa with K′ = 4.0 (±0.1).

Original language	English (US)
Pages (from-to)	577-583
Number of pages	7
Journal	Journal of Synchrotron Radiation
Volume	12
Issue number	5
DOIs	https://doi.org/10.1107/S0909049505022326
State	Published - Sep 2005

Keywords

Diamond-anvil cell
Equation of state
Helium pressure medium
Magnesiowüstite
Megabar
Single-crystal X-ray diffraction
Wüstite
Zone-axis diffraction

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation
Radiation

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@article{00d8d5dc3be74b029c93e79ff6eb0979,

title = "Single-crystal synchrotron X-ray diffraction study of w{\"u}stite and magnesiow{\"u}stite at lower-mantle pressures",

abstract = "This study demonstrates the use of monochromatic synchrotron X-ray radiation of 40 keV for high-precision equation-of-state studies on sets of single crystals analysed individually in the same diamond-anvil pressure cell. Angle-dispersive zone-axis diffraction patterns were obtained from crystals of wustite-Fe0.93O and magnesiow{\"u}stite-(Mg0.73Fe 0.27)O to 51 GPa in a hydrostatic helium pressure medium. The rhombohedral phase of Fe0.93O was observed above 23 GPa, and its isothermal bulk modulus (K0) was determined to be 134 (±4) GPa, assuming K′ = 4. The rhombohedral phase of Fe0.93O is more compressible than B1-structured Fe0.93O, with K0 = 146 (±2) GPa. Magnesiow{\"u}stite-(Mg0.73Fe0.27)O remains cubic over the experimental pressure range, and has a bulk modulus of 154 (±3) GPa with K′ = 4.0 (±0.1).",

keywords = "Diamond-anvil cell, Equation of state, Helium pressure medium, Magnesiow{\"u}stite, Megabar, Single-crystal X-ray diffraction, W{\"u}stite, Zone-axis diffraction",

author = "Jacobsen, {Steven D.} and Lin, {Jung Fu} and Angel, {Ross J.} and Guoyin Shen and Prakapenka, {Vitali B.} and Przemyslaw Dera and Mao, {Ho Kwang} and Hemley, {Russell J.}",

year = "2005",

month = sep,

doi = "10.1107/S0909049505022326",

language = "English (US)",

volume = "12",

pages = "577--583",

journal = "Journal of Synchrotron Radiation",

issn = "0909-0495",

publisher = "International Union of Crystallography",

number = "5",

}

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T1 - Single-crystal synchrotron X-ray diffraction study of wüstite and magnesiowüstite at lower-mantle pressures

AU - Jacobsen, Steven D.

AU - Lin, Jung Fu

AU - Angel, Ross J.

AU - Shen, Guoyin

AU - Prakapenka, Vitali B.

AU - Dera, Przemyslaw

AU - Mao, Ho Kwang

AU - Hemley, Russell J.

PY - 2005/9

Y1 - 2005/9

N2 - This study demonstrates the use of monochromatic synchrotron X-ray radiation of 40 keV for high-precision equation-of-state studies on sets of single crystals analysed individually in the same diamond-anvil pressure cell. Angle-dispersive zone-axis diffraction patterns were obtained from crystals of wustite-Fe0.93O and magnesiowüstite-(Mg0.73Fe 0.27)O to 51 GPa in a hydrostatic helium pressure medium. The rhombohedral phase of Fe0.93O was observed above 23 GPa, and its isothermal bulk modulus (K0) was determined to be 134 (±4) GPa, assuming K′ = 4. The rhombohedral phase of Fe0.93O is more compressible than B1-structured Fe0.93O, with K0 = 146 (±2) GPa. Magnesiowüstite-(Mg0.73Fe0.27)O remains cubic over the experimental pressure range, and has a bulk modulus of 154 (±3) GPa with K′ = 4.0 (±0.1).

AB - This study demonstrates the use of monochromatic synchrotron X-ray radiation of 40 keV for high-precision equation-of-state studies on sets of single crystals analysed individually in the same diamond-anvil pressure cell. Angle-dispersive zone-axis diffraction patterns were obtained from crystals of wustite-Fe0.93O and magnesiowüstite-(Mg0.73Fe 0.27)O to 51 GPa in a hydrostatic helium pressure medium. The rhombohedral phase of Fe0.93O was observed above 23 GPa, and its isothermal bulk modulus (K0) was determined to be 134 (±4) GPa, assuming K′ = 4. The rhombohedral phase of Fe0.93O is more compressible than B1-structured Fe0.93O, with K0 = 146 (±2) GPa. Magnesiowüstite-(Mg0.73Fe0.27)O remains cubic over the experimental pressure range, and has a bulk modulus of 154 (±3) GPa with K′ = 4.0 (±0.1).

KW - Diamond-anvil cell

KW - Equation of state

KW - Helium pressure medium

KW - Magnesiowüstite

KW - Megabar

KW - Single-crystal X-ray diffraction

KW - Wüstite

KW - Zone-axis diffraction

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SN - 0909-0495

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JO - Journal of Synchrotron Radiation

JF - Journal of Synchrotron Radiation

IS - 5

ER -

Single-crystal synchrotron X-ray diffraction study of wüstite and magnesiowüstite at lower-mantle pressures

Abstract

Keywords

ASJC Scopus subject areas

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