From Online Dictionary of Crystallography
Revision as of 05:43, 26 March 2006 by AndreAuthier
Classes de Laue (Fr). Laue Klassen (Ge). Clases de Laue (Sp).
The Laue classes correspond to the eleven centrosymmetric point groups. When absorption is negligible and Friedel's law applies, it impossible to distinguish by diffraction between a centrosymmetric point group and one of its non-centrosymmetric subgroups.
Section 3.1 of International Tables of Crystallography, Section A