The pressure-temperature equilibrium curve between diaspore and corundum and vapor was experimentally determined above 390° C and 1.5 kbar in two ways, by observing presence or absence of epitaxial growth of diaspore crystallites on corundum grains and by recording weight changes on single crystals of corundum. Equilibrium points were used to derive thermodynamic data for diaspore, which allowed calculation of the equilibrium curve below 390° C. This curve passes through 1 bar at 220° C, 170 bar at 360°, 2400 bar at 405°, and 7500 bar at 460°.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.