Mićo M. Mitrović

Growth rate dispersion of small KDP crystals

The growth rate dispersion of small KDP crystals grown from aqueous solution was studied. These dispersions were described by a mixture of normal distributions with three maxima which were fitted to the frequency distributions of growth data. Dislocation structure of individual crystals and varying degrees of strain in crystal lattice were considered as possible causes of this phenomenon.

Dependence of growth rate on initial crystal size

The connection between growth rate dispersion and the size-dependent crystal growth of potassium dihydrogen phosphate is investigated. A possible resolution of the existing confusion in the size-dependent crystal growth investigations is suggested. It is shown that size-independent growth exists if the crystals belonging to one growth rate distribution maximum are considered separately. On the other hand, a linear dependence exists between the arithmetic mean of growth rates belonging to one maximum and the arithmetic mean of corresponding initial crystal sizes. Possible reasons for the existence of extra growth rate distribution maxima and for their widths are suggested. The high scatter of data on the growth rate versus the crystal size dependence is discussed according to crystal growth theories.

Correlation between the crystal size and crystal growth rate of KDP and Rochelle salt crystals

It is shown that the dependence of the crystal growth rate on the initial crystal size is linear, or probably, more complex, but there is no reason for using some complex functions for describing the mentioned dependence, as many authors do. Correlation between the initial crystal size and the crystal growth rate is positive, i.e. higher growth rate of the crystals corresponds to the larger initial crystal size.

Influence of initial crystal size on growth rate of crystals from solutions

Abstract The influence of initial crystal size on crystal growth rate is studied. It was shown that in individual experiments with growth of Rochelle salt and MnCl 2 · 4H 2 O crystals, there exists a significantly higher correlation between the initial crystal size and linear growth rate than in the cases when correlation between these quantities is studied for all crystals growing on the same temperature and the same supersaturation of the solution.