EQUATION OF STATE, ELASTICITY, AND SHEAR STRENGTH OF PYRITE UNDER HIGH PRESSURE
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dc.contributor.author | Merkel S. | |
dc.contributor.author | Jephcoat A.P. | |
dc.contributor.author | Shu J. | |
dc.contributor.author | Mao H.K. | |
dc.contributor.author | Gillet P. | |
dc.contributor.author | Hemley R.J. | |
dc.date.accessioned | 2021-04-14T04:57:36Z | |
dc.date.available | 2021-04-14T04:57:36Z | |
dc.date.issued | 2002 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=901272 | |
dc.identifier.citation | Physics and Chemistry of Minerals, 2002, 29, 1, 1-9 | |
dc.identifier.issn | 0342-1791 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/27762 | |
dc.description.abstract | Physical properties including the equation of state, elasticity, and shear strength of pyrite have been measured by a series of X-ray diffraction in diamond-anvil cells at pressures up to 50 GPa. A Birch-Murnaghan equation of state fit to the quasihydrostatic pressure-volume data obtained from laboratory X-ray source/film techniques yields a quasihydrostatic bulk modulus K0T=133.5 (±5.2) GPa and bulk modulus first pressure derivative K′0T=5.73 (±0.58). The apparent equation of state is found to be strongly dependent on the stress conditions in the sample. The stress dependency of the high-pressure properties is examined with anisotropic elasticity theory from subsequent measurements of energy-dispersive radial diffraction experiments in the diamond-anvil cell. The calculated values of K0T depend largely upon the angle ψ between the diffracting plane normal and the maximum stress axis. The uniaxial stress component in the sample,t=σ3−σ1, varies with pressure as t=-3.11+0.43P between 10 and 30 GPa. The pressure derivatives of the elastic moduli dC11/dP=5.76 (±0.15), dC12/dP=1.41 (±0.11) and dC44/dP=1.92 (±0.06) are obtained from the diffraction data assuming previously reported zero-pressure ultrasonic data (C11=382 GPa, C12=31 GPa, and C44=109 GPa). | |
dc.subject | HIGH PRESSURE | |
dc.subject | ELASTICITY | |
dc.subject | PYRITE | |
dc.subject | SHEAR STRENGTH | |
dc.subject | RADIAL DIFFRACTION | |
dc.title | EQUATION OF STATE, ELASTICITY, AND SHEAR STRENGTH OF PYRITE UNDER HIGH PRESSURE | |
dc.type | Статья |
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