Spiral growth on carborundum crystal faces [1]

Abstract

In 1949 Frank1,2 pointed out the possibility that growth of crystals at low supersaturations, essential for good crystals, could take place because of the formation of dislocations in the crystal so that any real crystal should have a number of dislocations with a screw component, terminating on the face. When growth takes place on these exposed molecular terraces, the edges of these layers develop into spirals centred on the dislocation. © 1951 Nature Publishing Group.