Dislocation Networks and Moiré Patterns of Molybdenite

抄録

In electron micrographs of molybdenite films, various network-patterns were observed. They are interpreted as images of dislocation networks. Several electron micrographs are reproduced and remarkable features observed in them are explained in terms of dislocations. One of the remarkable observations is that each line of a network sometimes becomes broader and the network changes into a moiré pattern. The gradual change from a sharp image of dislocation to a broad moiré fringe can be explained by a simple consideration. The former implies that the strain accompanying the dislocation is concentrated and the latter, that the strain is spread.