Equation of state of liquid mercury to 520 K and 7 GPa from acoustic velocity measurements
Résumé
Ultrafast acoustics measurements on liquid mercury have been performed at high pressure and temperaturein a diamond anvil cell using picosecond acoustic interferometry. We extract the density ofmercury from adiabatic sound velocities using a numerical iterative procedure. We also report thepressure and temperature dependence of the thermal expansion, isothermal and adiabatic compressibility,bulk modulus, and pressure derivative of the latter up to 7 GPa and 520 K. We finally showthat the sound velocity follows a scaling law as a function of density in the overall measured metallicstate