Nov, 2009
Stress measurement under high pressure using Kawai-type multi-anvil apparatus combined with synchrotron radiation
JOURNAL OF SYNCHROTRON RADIATION
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- Volume
- 16
- Number
- First page
- 757
- Last page
- 761
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1107/S0909049509034955
- Publisher
- WILEY-BLACKWELL
A system for stress measurement under high pressure has been developed at beamline BL04B1, SPring-8, Japan. A Kawai-type multi-anvil apparatus, SPEED-1500, was used to pressurize polycrystalline KCl to 9.9 GPa in a mechanically anisotropic cell assembly with the KCl sample sandwiched between dense Al2O3 pistons. The variation of deviatoric stress was determined from the lattice distortion measured using two-dimensional X-ray diffraction with monochromatic synchrotron X-rays. The low-pressure B1 phase transformed to the high-pressure polymorph B2 during compression. The deviatoric stress increased with increasing pressure in both the B1 and B2 phases except for the two-phase-coexisting region at a pressure of 2-3 GPa. This new system provides one of the technical foundations for conducting precise rheological measurements at conditions of the Earth's lower mantle.
- Link information
- ID information
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- DOI : 10.1107/S0909049509034955
- ISSN : 0909-0495
- Web of Science ID : WOS:000271091000010