Hideo Takaki, Masashige Koyama and Hidekiyo Fujihira
An examination was carried out microscopically and X-ray analytically with single crystals of 99.87% and 99.995% pure tin, in order to clarify the relation between the temperature gradient and the substructures (corrugations and striations) which had been observed in single crystals of tin grown from the melt. The features obtained by increasing the temperature gradient from 13°C/cm to 45°/cm, are summarized as follows: (1) The direction of corrugations inclines steeply from the C rection of easy growth, , towards that of the specimen axis. (2) The striations are easy to generate. (3) On the free top surface of the single crystals of 99.87% pure tin grown in the  direction, the same step structure as observed in single crystals of 99.995% pure tin at 13°C/cm is also generated.
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