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

International Tables for Crystallography (2010). Vol. B, ch. 2.5, p. 350   | 1 | 2 |

Figure 2.5.3.20 

M. Tanakaf
[Figure 2.5.3.20]
Figure 2.5.3.20

(a) Mirror symmetry of modulation waves ([_{\;1}^m ]) τ4 = 0. (b) Glide symmetry of modulation waves ([_{\,s}^m ]) τ4 = ½. The wave number vector of modulation is k3c*.