Abstract
The structure of Σ = 3, {112} lateral twin boundaries in polycrystalline GaP has been investigated by transmission electron microscopy. The orientation of the polar bonding along the lateral twin boundary was characterized by convergent-beam electron diffraction and found to be mirror symmetric across the {112} interface. Rigid-body lattice translations and grain boundary dislocations along the boundaries were also characterized. The direction of the translation state between adjacent twin-related grains was studied by the α-fringe contrast technique. Models of the {112} interface in the GaP lattice are proposed and compared with the experimental observations.
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