Figure 9.2.4.5

Wolff, P. M. de

doi:10.1107/97809553602060000518

International
Tables for
Crystallography
Volume A
Space-group symmetry
Edited by Th. Hahn

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International Tables for Crystallography (2006). Vol. A. ch. 9.2, p. 752

Figure 9.2.4.5

P. M. de Wolff^a ^‡

^a Laboratorium voor Technische Natuurkunde, Technische Hogeschool, Delft, The Netherlands

Figure 9.2.4.5

The effect of the special conditions. Border lines of type-I and type-II regions are drawn as heavy lines if included. Type-I and type-II regions are marked as in Fig. 9.2.4.1. $[n_{b}]$ belongs to the type-II region. A heavy border line of a region stops short of an end point if the latter is not included in the region to which the border belongs. a, b net centred orthogonal (compressed); special conditions (9.2.2.3a), (9.2.2.5a).