Hexagonal and cylindrical systems

International
Tables for
Crystallography
Volume D
Physical properties of crystals
Edited by A. Authier

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International Tables for Crystallography (2006). Vol. D. ch. 1.1, p. 23

Section 1.1.4.9.9.6. Hexagonal and cylindrical systems

A. Authier^a ^*

^a Institut de Minéralogie et de la Physique des Milieux Condensés, Bâtiment 7, 140 rue de Lourmel, 75015 Paris, France
Correspondence e-mail: aauthier@wanadoo.fr

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(i) Groups , $[{\bar 6}]$ , ; $[(A_{\infty }/M)C, A_{\infty}]$ with $[t_{1111} - t_{1122} = t_{1212} + t_{1221}.]$

There are 12 independent components.
(ii) Groups , , , $[{\bar 6}2m]$ ; $[(A_{\infty }/M) \infty (A_{2}/M)C]$ , $[A_{\infty} \infty A_{2}]$ with $[t_{1111} - t_{1122} = t_{1212} + t_{1221}.]$

There are 10 independent components.