High-pressure X-ray diffraction study of ε-FeOOH

Akio Suzuki

doi:10.1007/s00269-009-0319-x

High-pressure X-ray diffraction study of ε-FeOOH

Akio Suzuki

SCI - Earth Science

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

25 Citations (Scopus)

Abstract

An in situ synchrotron X-ray diffraction study was carried out on ε-FeOOH at room temperature up to a pressure of 8.6 GPa using the energy-dispersive method. The linear compressibility was determined to be β_a = 1.69(3) × 10^-3 GPa^-1, β_b = 2.86(6) × 10^-3 GPa^-1, and β_c = 1.73(5) × 10^-3 GPa^-1. The b-axis of the unit cell is more compressible than the a and c axes. The pressure-volume data were fitted to a third-order Birch-Murnaghan equation of state. The best fit was found using a room temperature isothermal bulk modulus of K₀ = 126(3) GPa and its pressure derivative K′ = 10(1).

Original language	English
Pages (from-to)	153-157
Number of pages	5
Journal	Physics and Chemistry of Minerals
Volume	37
Issue number	3
DOIs	https://doi.org/10.1007/s00269-009-0319-x
Publication status	Published - 2010 Mar 1

Keywords

Equation of state
High pressure
Synchrotron radiation
X-ray diffraction

ASJC Scopus subject areas

Materials Science(all)
Geochemistry and Petrology

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10.1007/s00269-009-0319-x

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AB - An in situ synchrotron X-ray diffraction study was carried out on ε-FeOOH at room temperature up to a pressure of 8.6 GPa using the energy-dispersive method. The linear compressibility was determined to be βa = 1.69(3) × 10-3 GPa-1, βb = 2.86(6) × 10-3 GPa-1, and βc = 1.73(5) × 10-3 GPa-1. The b-axis of the unit cell is more compressible than the a and c axes. The pressure-volume data were fitted to a third-order Birch-Murnaghan equation of state. The best fit was found using a room temperature isothermal bulk modulus of K0 = 126(3) GPa and its pressure derivative K′ = 10(1).

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High-pressure X-ray diffraction study of ε-FeOOH

Abstract

Keywords

ASJC Scopus subject areas

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