Abstract
Segregation from solutions and melts is compared theoretically. It is shown from thermodynamic arguments that equilibrium solution segregation is more effective. Segregation coefficients k0 are calculated for aqueous alkali halide systems, based upon theoretical heat of dissolution values (solid solution) and solubility data (liquid solution). Good agreement with experimental values is obtained over a range of 1 > k0 > 10−4. A critical discussion of the available experimental data and limitation of the thermodynamic theory in terms of off-equilibrium phenomena is given.
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