Isothermal compression of Al and Ag to 120 kbar

Isothermal compression curves for Ag and Al have been determined by high-pressure x-ray diffraction studies in the 120-kbar range. The pressure-volume relations can be represented by a Birch equation with B0=727 kbar and B′0=4.30 for Al, and B0=1061 kbar and B′0=4.70 for Ag (B0 is the isothermal bulk modulus at ambient conditions and B′0= (dB/dP)P=0. Systematic errors of the PV relations are estimated to be ±2 kbar at 100 kbar relative to the NaCl pressure scale.