Equations of state for Cu, Ag, and Au and problems with shock wave reduced isotherms

Abstract

Thermophysical data at low pressure are used to constrain a thermodynamic model for equations of state and all the other thermophysical properties in wide ranges of pressure and temperature. Comparisons with shock wave reduced isotherms show strong deficiencies in the models used in the data reductions. A revision in the evaluation of static high-pressure X-ray diffraction data for Cu and Au together with data for ruby luminescence line shifts from the literature lends further support to some recent refinements of the ruby pressure scale.

Keywords:

• equations of state
• pressure scale
• shock waves