International Tables for Crystallography

Powder and related techniques: electron and neutron techniques
J. M. Cowley and A. W. Hewat. International Tables for Crystallography (2006). Vol. C, ch. 2.4, pp. 80-83  [ doi:10.1107/97809553602060000579 ]


In the first part of this chapter, methods for obtaining powder diffraction patterns using electron microscopy are described. The effects of preferred orientation are considered and the kinematical and two-beam approximations for the intensities of electron diffraction are described. Factors that have to be considered when using powder electron diffraction techniques for crystal-size analysis and the identification of unknown phases are noted. In the second part of the chapter, powder neutron diffraction is described. Advantages of powder neutron diffraction include the ability to collect data from samples at high or low temperatures or as a function of pressure. The different types of diffractometer in use are discussed and optimal experimental conditions for different kinds of experiments are considered.

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About International Tables for Crystallography

International Tables for Crystallography is the definitive resource and reference work for crystallography. The series consists of nine volumes and comprises articles and tables of data relevant to crystallographic research and to applications of crystallographic methods in all sciences concerned with the structure and properties of materials.