Difference between revisions of "Subperiodic group"
From Online Dictionary of Crystallography
(No difference)
|
Revision as of 11:31, 6 January 2009
Groupe sous-périodique (Fr); Gruppo subperiodico (It).
A subperiodic group is a group possessing translational periodicity in a subspace of the space where the group is acting. Subperiodic groups in two and three-dimensional spaces are classified in:
- frieze groups: two-dimensional groups with one-dimensional translations;
- rod groups: three-dimensional groups with one-dimensional translations;
- layer groups: three-dimensional groups with two-dimensional translations.
See also
International Tables of Crystallography, Volume E