Tables for
Volume A
Space-group symmetry
Edited by M. I. Aroyo

International Tables for Crystallography (2016). Vol. A, ch. 2.1, pp. 154-155

Section Triclinic space groups

Th. Hahna and A. Looijenga-Vosb Triclinic space groups

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For each of the two triclinic space groups, three elevations (along a, b and c) are given, in addition to the general-position diagram [{\sf G}] (projected along c) at the lower right of the set, as illustrated in Fig.[link].


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Triclinic space groups ([\hbox{\sf G}] = general-position diagram).

The diagrams represent a reduced cell of type II for which the three interaxial angles are non-acute, i.e. [\alpha,\beta,\gamma \geq\! 90^{\circ}]. For a cell of type I, all angles are acute, i.e. [\alpha,\beta,\gamma \,\lt\,90^{\circ}]. For a discussion of the two types of reduced cells, see Section 3.1.3[link] .

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