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

Yuichi, Akahama and Naohisa, Hirao and Yasuo, Ohishi and Singh, AK (2014) Equation of state of bcc-Mo by static volume compression to 410 GPa. Journal of Applied Physics, 116. ISSN 0021-8979

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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 0 = 262.3(4.6) GPa, K 0′ = 4.55(16) with one atmosphere atomic volume V 0 = 31.155(24) A3. 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.

Item Type: Article
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Mr. BS Shivaram
Date Deposited: 19 Dec 2014 08:19
Last Modified: 19 Dec 2014 08:19
URI: http://nal-ir.nal.res.in/id/eprint/12055

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