Phys. Rev. B 69, 092106 (2004) [4 pages]Refinement of the equation of state of tantalumReceived 28 August 2003; revised 1 December 2003; published 18 March 2004 The volume of tantalum versus pressure has been accurately measured up to 101 GPa by single-crystal x-ray diffraction, with helium as pressure transmitting medium. Slight deviation from previous static determinations is observed. Discrepancy with reduced shock-wave and ultrasonic data supports recent doubts about the calibration of the ruby pressure scale. Finally, first-principle calculations of the literature show a positive curvature in P(V) relative to the experimental data, even with a modified pressure scale. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.092106
DOI:
10.1103/PhysRevB.69.092106
PACS:
64.30.+t, 61.10.Nz, 07.35.+k
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