ABSTRACT
The morphological changes of a crystal during kinetic processes are strongly dependent upon process variables such as temperature, supersaturation, agitation, type of solvent, impurities, surface active agents, and so on. A correct kinetic model should enable to estimate the effect of process variables on the facial growth rates and to control the size and shape of crystals. A more realistic kinetic model of crystal growth, with the direction of growth normal to the individual crystal faces. Establishing the critical condition is a necessary step in achieving the possibility of controlling crystal growth processes. Once the effects of process variables are characterized, and by applying the critical condition for a face to disappear, one should be able to control the size and shape of a crystal by controlling the process variables in the manner indicated by model analysis.
