Electron Diffraction and Crystallography
The practice of indexing single crystal diffraction patterns is explained, and worked in detail. Rules for generating and using stereographic projections for solving problems in crystallography are presented. Kikuchi lines are explained as a double-diffraction phenomenon, and Kikuchi lines are shown to be useful for setting up precise diffraction conditions. Other effects of double diffraction are described. Methods for using convergent-beam electron diffraction (CBED) patterns for practical measurements are explained, such as measurements of beam convergence and sample thickness. Methods for determining the point group of a crystal are described, as are methods, strategies and examples of determining the space group of a crystal from CBED patterns.