Ions in aqueous solutions at high temperatures and pressures

At high pressures water is a good electrolytic solvent even at supercritical temperatures. The results of new measurements of the water density to 600 °C and 10 kbar, of the dielectric constant to 500 °C and 5 kbar and of the infrared absorption to 400 °C and 4 kbar are given and discussed.The solubility of inerts gases, the complex formation of bivalent cobalt and nickel and the electrolytic conductance of dissolvent salts in water at supercritical temperatures and pressures up to 6 kbar is described.The increase of the specific conductance of pure water by more than 7 orders of magnitude at 1000 °C and 100 kbar is discussed