International
Tables for Crystallography Volume C Mathematical, physical and chemical tables Edited by E. Prince © International Union of Crystallography 2006 
International Tables for Crystallography (2006). Vol. C. ch. 8.8, p. 736


Figure 8.8.1
Schematic representations of four convergentbeam configurations used for structurefactor determination: (a) intensity profile of a loworder reflection, g; (b) nonsystematic three or fourbeam configuration with a strong coupling reflection, h; (c) symmetric manybeam configuration in a dense zone; (d) integrated intensity measurement of highorder reflections using a wide aperture (Taftø & Metzger, 1985). 