AN EQUATION OF STATE FOR CARBON-DIOXIDE VALID FROM ZERO TO EXTREME PRESSURES

A new form of equation of state is described with application to carbo n dioxide from 215 K to T > 2000 K and from zero pressure to more than 10(5) bar (10 GPa). The equation was calibrated using properties pred icted by existing formulations at low to moderate PTconditions, origin al experimental PVTdata at higher pressures, corresponding states comp arisons at higher temperatures and using shock compression data at sti ll higher PTs. Extensive comparisons illustrating the correlation of o ur new EOS with available phase equilibria and volumetric data are pro vided. Fugacities of carbon dioxide at high pressures and temperatures predicted using our EOS are in agreement with mineral equilibria calc ulated from internally consistent thermodynamic data for minerals.