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

International Tables for Crystallography (2006). Vol. B, ch. 4.6, p. 497   | 1 | 2 |

Figure 4.6.3.3 

W. Steurera* and T. Haibacha

aLaboratory of Crystallography, Swiss Federal Institute of Technology, CH-8092 Zurich, Switzerland
Correspondence e-mail:  w.steurer@kristall.erdw.ethz.ch

[Figure 4.6.3.3]
Figure 4.6.3.3

Schematic diffraction patterns for 3D IMSs with (a) 1D harmonic and (b) rectangular density modulation. The modulation direction is parallel to [{\bf a}_{2}]. In (a) only first-order satellites exist; in (b), all odd-order satellites can be present. In (c), the diffraction pattern of a harmonic displacive modulation along [{\bf a}_{1}] with amplitudes parallel to [{\bf a}_{2}^{*}] is depicted. Several reflections are indexed. The areas of the circles are proportional to the reflection intensities.