It was shown that edge dislocations in ZnO single crystals could be produced by growth around a fourling nucleus. It was suggested that dislocation assisted growth resulting from some of these dislocations led to the formation of hillocks on the prismatic surfaces. An analysis of the four possible twin relationships indicated that the primary fourling legs were related to the central spine by a reflection across a plane normal to the [11•¯2] direction. A similar analysis of a secondary leg indicated that the most probable twin relationship was a reflection across the plane normal to the [11•¯2] direction.

A Mechanism for the Formation of Dislocations in ZnO Single Crystals. Jones, K.A.: Journal of Crystal Growth, 1971, 8[1], 63-8