According to the recent work by Turnbull, the rate of nucleation in the mother phase would be given by the following formula.
rate of nucleation=n(A/9π)
1/2(NkT/h)exp{-(Ai*
2/3-Bi*+Δf*)/kT},
where A, B and i* are the variable consrants depending on the substances and the temperature, but its numerical caluculation should be difficult because of the practical impossibility of the determination of these constants.
The present author has tried to evaluate them (A, B and i*) by aid of the thermodynamical consideration,
assuming that
1) The interfatial tension between the embryo and the solution can be estimated by use of the heat of crystallization.
2) Considering their inter fatial structure, the embryo can be treated as the charged spheres.
In this point of view the caluculation has been done for the case of the supersaturated KCl solution and a preferable results have been obtaind from which the critical temperature of the crystallization process may be discussed to some extent.
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