Accession Number:

AD0431182

Title:

SOLUBILITY OF METAL OXIDES IN SUPERCRITICAL AQUEOUS SOLUTIONS

Descriptive Note:

Final rept., 1 June 1962-31 Oct 1963

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s):

Report Date:

1963-10-31

Pagination or Media Count:

54.0

Abstract:

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.

Subject Categories:

  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE