Abstract
The interface was studied by microscopical examination of crystals decanted from the melt. Crystals which had been allowed to approach equilibrium at a curved isotherm showed facets on which the features could be correlated with crystal growth mechanisms. On the curved areas of the interface, lines having a regular spacing were observed, which previously have been assumed to be growth steps. The lines were shown to be grooves without a definite crystallographic orientation and evidence against their origin during the crystal growth process was obtained.

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