ИСТИНА

Crystal growth experiments were carried out by cooling paraffin melt in the temperature range of 55-25oC. Hexagonal and orthorhombic forms of normal paraffins crystallize at the cooling rates of 25.5, 10 and 4oC/h in the above temperature range, and dimensions of the plate-like crystals increase in about 1.5-2 times with decreasing cooling rates. Structural characteristics and type of the grown paraffin crystals were determined from X-ray diffraction patterns. Relationships between the growth conditions, structure and morphology of normal paraffin crystals have been discussed.