Phase Diagrams of H2O and D2O at High Pressures
- 15 June 1968
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 48 (12), 5509-5514
- https://doi.org/10.1063/1.1668248
Abstract
The VIII/VII phase boundaries of solid H2O and D2O were studied by means of differential thermal analysis. The thermal hysteresis of the transition decreases with increasing pressure, but the presumed equilibrium temperatures are independent of pressure to 40 kbar. The transition is of the first order, and the average transition temperature is −3°C in both cases. The ice VI/VII transition pressure at 25°C is 21.39 ± 0.05 kbar, in good agreement with other recent studies, but considerably lower than Bridgman's value. The heavy ice VI/VII and VI/VIII transition lines are located ∼1.4 kbar below the ice VI/VII and VI/VIII transition lines. The heavy ice VI/VII transition at 25°C occurs at 19.90 ± 0.07 kbar. Bridgman's melting curves of ice VI and ice VII are shown to be correct. The melting curve of heavy ice VI is ∼2°C above that of ice VI, but the heavy‐ice VI/VII/liquid triple point is located at 78°C, 20.6 kbar as compared with 81.6°C, 21.97 kbar for H2O. The melting curve of heavy ice VII appears to have a stronger curvature than the melting curve of ice VII.Keywords
This publication has 20 references indexed in Scilit:
- Polymorphism and melting in the alkali nitrates to 40kb with some comments on the alkaline earth carbonatesJournal of Physics and Chemistry of Solids, 1966
- Pressure Dependence of the emf of ThermocouplesJournal of Applied Physics, 1966
- Melting and freezing of selenium and tellurium at high pressuresJournal of Physics and Chemistry of Solids, 1966
- Melting curves of the potassium halides at high pressuresJournal of Physics and Chemistry of Solids, 1965
- Polymorphic transitions of the alkali bromides and iodides at high pressures to 200°CJournal of Physics and Chemistry of Solids, 1965
- Pressure Dependence of the emf of Thermocouples to 1300°C and 50 kbarJournal of Applied Physics, 1965
- Parameters in the Simon Equation Relating Pressure and Melting TemperatureReviews of Modern Physics, 1963
- The pressures of some solid-solid transitionsJournal of Geophysical Research, 1962
- Bemerkungen zur SchmelzdruckkurveZeitschrift für anorganische und allgemeine Chemie, 1929
- Water, in the Liquid and Five Solid Forms, under PressureProceedings of the American Academy of Arts and Sciences, 1912