Dissociation Pressures of the Phase CO 2 · 5 3/4 H 2 O

The dissociation pressure of the solid phase CO2 · 5{aastex} {amsbsy} {amsfonts} {amssymb} {bm} {mathrsfs} {pifont} {stmaryrd} {textcomp} {portland,xspace} {amsmath,amsxtra} {wasysym} {empty} {10}{9}{7}{6} {document}3/4{document} H2O has been measured to 2,000 bars. This dissociation curve rises from 45 bars at 10° C. to 2,000 bars at 19.7° The solid hydrate freezes from immiscible water-rich and rich liquids over this pressure and temperature interval. ΔV of dissociation ranges from 24 cc/mole to 4 cc/mole. The density of the hydrate calculated from the dissociation pressure curve is in good agreement with the density obtained by other investigators from X-ray measurements. The application of the phase relations in the system CO2-H2O to the study of fluid inclusions in discussed.