KINETICS OF GROWTH OF MAGNESIUM HYDROXIDE CRYSTALS

The kinetics of growth of Mg(OH)₂, seed crystals at 298, 308 and 318 K from an a~ueous supersaturated solution of initial concentrations of Mg(OH)₂ 0,48, 0.60 and 0.73 mol-3 were determined. The growth was followed by measuring the conductivity of a seeded system as a function of time. The growth kinetics satisfied a first order kinetic equation. Within the examined range of variables the kinetic constant is independent of temperature and the initial concentration and dependenl on the surface area of seeds added at the start of the experiment. The growth of crystals under the studied conditions is controlled by the surface reaction mechanism.