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

International Tables for Crystallography (2012). Vol. F, ch. 2.1, p. 56   | 1 | 2 |


J. Drentha*

aLaboratory of Biophysical Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
Correspondence e-mail:


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[link]). Copyright (1999) Springer-Verlag.