Acoustic Velocities and Elastic Properties of Pyrite (FeS<sub>2</sub>) to 9.6 GPa

Matthew L Whitaker; Wei Liu; Liping Wang; Baosheng Li

doi:10.1007/s12583-010-0115-z

Volume 21 Issue 5

Oct 2010

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Journal of Earth Science > 2010 > 21(5): 792-800.

Matthew L Whitaker, Wei Liu, Liping Wang, Baosheng Li. Acoustic Velocities and Elastic Properties of Pyrite (FeS2) to 9.6 GPa. Journal of Earth Science, 2010, 21(5): 792-800. doi: 10.1007/s12583-010-0115-z

Citation:

Matthew L Whitaker, Wei Liu, Liping Wang, Baosheng Li. Acoustic Velocities and Elastic Properties of Pyrite (FeS₂) to 9.6 GPa. Journal of Earth Science, 2010, 21(5): 792-800. doi: 10.1007/s12583-010-0115-z

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Acoustic Velocities and Elastic Properties of Pyrite (FeS₂) to 9.6 GPa

doi: 10.1007/s12583-010-0115-z

Mineral Physics Institute, Stony Brook University, New York 11794-2100, USA
Geodynamics Research Center, Ehime University, Matsuyama 790-8577, Japan

Funds:

the USA National Science Foundation EAR00135550

the USA National Science Foundation EAR0635860

the USA Department of Energy, Office of Science, Office of Basic Energy Sciences DE-AC02-98CH10886

the Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement EAR01-35554

the Mineral Physics Institute, Stony Brook University MPI Publication No. 480

More Information

Corresponding author: Matthew L Whitaker, matt@mattwhitaker.net
Received Date: 04 May 2010
Accepted Date: 07 Jun 2010
Publish Date: 01 Oct 2010

Abstract

Abstract

Ultrasonic interferometry was utilized in conjunction with synchrotron-based X-ray diffraction and X-radiographic imaging to determine the compressional and shear wave velocities and unit-cell volumes of pyrite (FeS₂) at room temperature and pressures up to 9.6 GPa. Fitting all of the experimental volume and velocity data to third-order finite-strain equations yielded the adiabatic zero-pressure bulk and shear moduli and their first pressure derivatives: K_S0=138.9(7) GPa, G₀=112.3(3) GPa, (∂K_S0/∂P) _T=K_S0′=6.0(1), (∂G₀/∂P) _T=G₀′=3.0(< 1), where the numbers in parentheses represent the 1σ uncertainty in the last significant digit. These results are in good agreement with several previous static compression studies on this material but differ quite strongly from the results obtained via first principles calculations. This study presents the first direct measurement of the bulk shear properties of this material.
- mineral physics,
- ultrasonic interferometry,
- high pressure,
- iron sulfide,
- elastic property,
- equation of state

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References(32)

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