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Title: Strength and equation of state of NaCl from radial x-ray diffraction

The strength and equation of state of NaCl were determined under nonhydrostatic compression up to 27 GPa using an energy-dispersive radial x-ray diffraction technique in a diamond-anvil cell using the lattice strain theory. Together with estimation of the high-pressure shear modulus, it is suggested that NaCl could support a maximum differential stress of 0.980 GPa at 22.6 GPa under uniaxial compression. The differential stress rapidly drops at 27.2 GPa due to the phase transition from B1 phase to B2 phase for NaCl. The hydrostatic compression data of B1 phase yield a bulk modulus K{sub 0} = 25.6(8) GPa and its pressure derivative K{sub 0}′ = 5.16(20) using Pt pressure scale. In addition, a comparative study of the observed pressures from Pt scale and ruby-fluorescence scale shows that the ruby-fluorescence pressures may reflect the lower stress state under nonhydrostatic compression compared with hydrostatic compression.
Authors:
;  [1] ;  [2]
  1. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
  2. Department of Physics and Astronomy, University of Nevada Las Vegas and High Pressure Science and Engineering Center (HiPSEC), Las Vegas, Nevada 89154-4002 (United States)
Publication Date:
OSTI Identifier:
22275744
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; COMPRESSION; DIAMONDS; EQUATIONS OF STATE; FLUORESCENCE; PHASE TRANSFORMATIONS; PLATINUM; PRESSURE DEPENDENCE; RUBY; SHEAR PROPERTIES; SODIUM CHLORIDES; STRAINS; STRESSES; X-RAY DIFFRACTION