The microdiffraction from a single translation domain boundary (TDB) in bet
a-Ni3Nb has been recorded by using a Hitachi HF-2000 field emission gun tra
nsmission electron microscope, while high-resolution transmission electron
microscopy images were used to assist the analysis. The diffraction splitti
ng effect of a TDB is well explained by the kinematics and dynamic calculat
ions, and complex diffraction characteristics have been studied by using dy
namics simulation.