International
Tables for
Crystallography
Volume B
Reciprocal space
Edited by U. Shmueli

International Tables for Crystallography (2006). Vol. B, ch. 5.1, p. 535   | 1 | 2 |

## Figure 5.1.2.1

A. Authiera*

aLaboratoire de Minéralogie-Cristallographie, Université P. et M. Curie, 4 Place Jussieu, F-75252 Paris CEDEX 05, France
Correspondence e-mail: authier@lmcp.jussieu.fr

 Figure 5.1.2.1 Bragg reflection. (a) Direct space. Bragg reflection of a wave of wavevector incident on a set of lattice planes of spacing d. The reflected wavevector is . Bragg's law can also be written , where is the inverse of the length of the corresponding reciprocal-lattice vector (see part b). (b) Reciprocal space. P is the tie point of the wavefield consisting of the incident wave and the reflected wave . Note that the wavevectors are oriented towards the tie point.