The {11•1} twin interface was studied by using an analytical model for graphite. It was shown that the twin interface was composed of a special atomic geometry (so-called 8-4-8 polygons) and was stable and mobile. Simulation studies indicated that the {11•1} twin interface could consist of a special local atomic structure (8-4-8 polygons). Boundaries which were composed of such structure had an energy of 0.09J/m2 and an activation energy for migration of 3eV (which was due mainly to the formation of a kink along the boundary line). The results suggested that the existence of a 8-4-8 structure at the twin interface was not improbable when compared with the more widely accepted dislocation model.

Simulation of the Twin Interface in Graphite. C.S.Yoon, C.K.Kim, J.Megusar: Carbon, 2001, 39[7], 1045-9