FLUID INCLUSIONS IN HYDROTHERMALLY SYNTHESIZED BRUCITE CRYSTALS

Abstract

Brucite crystals were grown hydrothermally from Mg(OH)₂ powder in 7.5 and 15 mol% NaOH solutions. It is established from the obsevation of the surface microtopographs that the crystals grew by the spiral mechanism. The filling degree of numerous fluid inclusions in the crystals grown under various conditions of pressure, temperature and concentration of solution are measured. The P-T-F.D. relations of NaOH solution are discussed on the basis of these measurements.