Difference between revisions of "Geometric crystal class"

From Online Dictionary of Crystallography

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== See also ==
== See also ==
*[[Arithmetic crystal class]]
Section 8.2.4 of ''International Tables of Crystallography, Volume A''<br>
*Section 8.2.4 of ''International Tables of Crystallography, Volume A''<br>
[[Category:Fundamental crystallography]]
[[Category:Fundamental crystallography]]

Revision as of 10:06, 9 April 2007

Classes cristallines géométriques (Fr); Geometrische Kristallklasse (Ge); Clases cristallinas geométricas (Sp); Classi cristalline geometriche (It).


Geometric crystal classes (or simply 'crystal classes') classify the symmetry groups of the external shape of macroscopic crystals, namely according to the morphological symmetry. There are 10 two-dimensional geometric crystal classes and 32 three-dimensional geometric crystal classes, in one to one correspondence with the 10 and 32 point groups in E2 and E3, respectively.

See also