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Title: Equation of state of bcc-Mo by static volume compression to 410 GPa

Unit cell volumes of Mo and Pt have been measured simultaneously to ≈400 GPa by x-ray powder diffraction using a diamond anvil cell and synchrotron radiation source. The body-centered cubic (bcc) phase of Mo was found to be stable up to 410 GPa. The equation of state (EOS) of bcc-Mo was determined on the basis of Pt pressure scale. A fit of Vinet EOS to the volume compression data gave K{sub 0} = 262.3(4.6) GPa, K{sub 0}′ = 4.55(16) with one atmosphere atomic volume V{sub 0} = 31.155(24) A{sup 3}. The EOS was in good agreement with the previous ultrasonic data within pressure difference of 2.5%–3.3% in the multimegabar range, though the EOS of Mo proposed from a shock compression experiment gave lower pressure by 7.2%–11.3% than the present EOS. The agreement would suggest that the Pt pressure scale provides an accurate pressure value in an ultra-high pressure range.
Authors:
 [1] ; ;  [2] ;  [3]
  1. Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigohri, Hyogo 678-1297 (Japan)
  2. Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Mikazuki, Sayo-gun, Hyogo 679-5198 (Japan)
  3. Materials Science Division, National Aerospace Laboratories, Bangalore 560 017 (India)
Publication Date:
OSTI Identifier:
22402762
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 22; 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; BCC LATTICES; COMPRESSION; DIAMONDS; EQUATIONS OF STATE; PRESSURE RANGE GIGA PA; PRESSURE RANGE MEGA PA 10-100; SYNCHROTRON RADIATION SOURCES; X-RAY DIFFRACTION