Influence of Magnetic Field in the Kinetics of Crystallization of Diamagnetic and Paramagnetic Inorganic Salts

The influence of the magnetic field on some kinetic crystallization parameters of the systems zinc sulfate - water and copper sulfate - water were investigated in a series of controlled batch cooling experiments. The solutions were exposed to magnetic fields with different intensities, up to a maximum of 0.7T. A clear influence of magnetic field on the zinc sulfate crystallization parameters was found: an increase in the saturation temperature, a decrease in the metastable zone width, and increased growth rate and average crystal size. These effects were observed for the diamagnetic zinc sulfate, but not in similar experiments with paramagnetic copper sulfate.