Figure 2.1.4.9

Drenth, J.

doi:10.1107/97809553602060000658

International
Tables for
Crystallography
Volume F
Crystallography of biological macromolecules
Edited by M. G. Rossmann and E. Arnold

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International Tables for Crystallography (2006). Vol. F. ch. 2.1, p. 56 | 1 | 2 |

Figure 2.1.4.9

J. Drenth^a ^*

^a Laboratory of Biophysical Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
Correspondence e-mail: j.drenth@chem.rug.nl

Figure 2.1.4.9

X-ray diffraction by a crystal is, in Bragg's conception, reflection by lattice planes. The beams reflected by successive planes have a path difference of $[2d \sin \theta]$ , where d is the lattice-plane distance and θ is the reflecting angle. Positive interference occurs if $[2d \sin \theta = \lambda]$ , $[2\lambda]$ , $[3\lambda]$ etc., where λ is the X-ray wavelength. Reproduced with permission from Drenth (1999). Copyright (1999) Springer-Verlag.