DISPUTE ISSUES IN THE THEORY OF NUCLEATION DURING CRYSTALLIZATION FROM MELTS AND SOLUTIONS AND WAYS TO OVERCOME THEM

Alternative options for calculating the critical sizes lkof nuclei and the work Ak of their formation during crystallization from overcooled melts and supersaturated solutions are proposed. A comparative analysis of the critical sizes lk of nuclei and the work Ak of their formation, obtained by the formulas of the "classical" approach and the proposed alternative one, has been carried out. The results of the analysis are shown in the corresponding graphs. It is shown that elementary cells can act as nuclei, and the work of their formation corresponds to the bond energies in crystals.