Refinement of the equation of state of tantalum

Abstract

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.

arXiv commentTo be published in Phys. Rev. B 69, p. 0921XX, 2004

References in corpus (2)

• Thermal Equation of State of Tantalum
• Equation of state and phonon frequency calculations of diamond at high pressures

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