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Neutron techniques
Hewat, A. W.  International Tables for Crystallography (2006). Vol. C, Section 2.4.2, pp. 82-83 [ doi:10.1107/97809553602060000579 ]
... systematic errors (Wilson, 1963) are smaller, and the absence of a form factor means that information is available at small d ... at very low or high temperature; examining the structure as a function of temperature (or pressure) is much more useful than ... . In some cases, `kinetics' measurements at intervals of only a few seconds are needed to follow chemical reactions. A ...

Powder and related techniques: electron and neutron techniques
Cowley, J. M. and Hewat, A. W.  International Tables for Crystallography (2006). Vol. C, ch. 2.4, pp. 80-83 [ doi:10.1107/97809553602060000579 ]
... data from samples at high or low temperatures or as a function of pressure. The different types of diffractometer in use ... of experiments are considered. 2.4.1. Electron techniques J. M. Cowley a++ Powder-pattern geometry | | The electron wavelengths normally used to ... are usually recorded on flat photographic plates or films and a small-angle approximation is applied. For a camera length ...

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