SOLUBILITY OF METAL OXIDES IN SUPERCRITICAL AQUEOUS SOLUTIONS
Final rept., 1 June 1962-31 Oct 1963
STANFORD RESEARCH INST MENLO PARK CA
Pagination or Media Count:
An effort was made to elucidate some of the basic processes underlying the growth of single crystals from hydrothermal solutions. To grow crystals by this means it is necessary to find a region where 1 the crystal is stable, 2 the solubility of the compound is sufficient, and 3 supersaturation is neither too low nor too high for growth at a reasonable rate. The study chiefly concerns measurements of the solubility of rutile in supercritical water and basic media in the temperature range 375 to 525 C under solution pressures of 5000 to 33,000 psi. The laboratory equipment and a method for measuring the equilibrium densities of the solutions are discussed. A fundamental equation is derived which, with the use of the Vant Hoff equation, permits calculation, from only a few measurements, of the solubility of metal oxides in basic hydrothermal solutions.