Abstract
1. Potassium chloride crystallizes in the shape of octahedron, by cooling the supersaturated potassium chloride solution containing a small amount of sodium polymetaphosphate (NaPO3) n and manganese chloride as a growth additive.
2. The KCl crystal obtained by this metbod includes the additive. The quantity of additive included in the crystal is directly proportional to the initial concentration of the additive dissolved in the KCl solution.
3. The KCl crystal including the additive has an internal strain. The strain increases with increasing quantity of the additive, up to a certain value. Near this value the crystal shape of KCl changes from the dendrite to the octahedron.
