Abstract
The surface structure and texture of potassium chloride crystals containing an additive were investigated with the aid of optical or electron microscope. These crystals in shape of octahedron were obtained by cooling the supersaturated potassium chloride solution containing a mixture of (NaPO3) n and MnCl2 as the additive.
1. A growth pattern is found on the crystal surface, with growth layers spread irregularly. The layer develops from a closed loop originating from a pair of opposite dislocations.
2. On the growth layer, there occur small trigonal hillocks and also grain boundary where the additive is probably present.
3. The dbove-mentioned growth feature in the crystallization varies with such factors, as the supersaturation ratio, the rate of cooling the solution and the quantity of the additive in the solution.
