Figure 4.6.2.1

Steurer, W.; Haibach, T.

doi:10.1107/97809553602060000568

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

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International Tables for Crystallography (2006). Vol. B. ch. 4.6, p. 488 | 1 | 2 |

Figure 4.6.2.1

W. Steurer^a ^* and T. Haibach^a

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

Figure 4.6.2.1

The combination of a basic structure $[s({\bf r})]$ , with period a, and a sinusoidal modulation function [f(t)] , with amplitude A, period λ and $[t = {\bf q}\cdot {\bf r}]$ , gives a modulated structure (MS) $[s_{m}({\bf r})]$ . The MS is aperiodic if a and λ are on incommensurate length scales. The filled circles represent atoms.