From Online Dictionary of Crystallography
Revision as of 03:44, 26 November 2018 by MassimoNespolo (types of)
Groupe sous-périodique (Fr). Subperiodische Gruppe (Ge). Gruppo subperiodico (It). 亜周期群 (Ja). Groupo subperiódico (Sp).
A crystallographic subperiodic group in n-dimensional space is a subperiodic group for which the group of linear parts is a crystallographic point group of n-dimensional space. The crystallographic subperiodic groups in two and three-dimensional space are classified in:
- frieze groups: 7 two-dimensional types of groups with one-dimensional translations;
- rod groups: 75 three-dimensional types of groups with one-dimensional translations;
- layer groups: 80 three-dimensional types of groups with two-dimensional translations.
- International Tables for Crystallography, Volume E