Numerical simulation of nucleation phenomena during
crystallization demands a definition several parameters of the clusters of
crystalline molecules in initial amorphous phase. Among of such key parameters
are a numbers of molecules on the surface of cluster these can be transformed
from one phase to other changing number of molecules in the cluster.

Let’s cluster has i molecules with volume vm
each.

Effective size of d is defined by equation vm = d3

The volume of the cl...