Computer-assisted analysis of incomplete powder electron diffraction patterns
Incomplete powder electron diffraction patterns are traditionally difficult to interpret and are usually simply overlooked as being a sort of not-veryuseful background noise in the flow of data gathered in sample analysis. However, if techniques can be developed to systematize the information contained in those patterns, it can be a major contribution to the unravelling of complex materials problems. The following simple techniques are applied in our laboratories:1. Patterns are recorded on Technical Pan 35mm film, using a double-exposure to obtain a well-exposed record of the rings and spots; a very small central spot is exposed at much lower intensity with the beam stop removed. The film is developed at high contrast in HC-110, dilution F (1:9).