Tetartohedry
From Online Dictionary of Crystallography
Tétartoédrie (Fr). Tetartoedrie (Ge). Tetartoedria (It). 四半面像(Ja). Tetartoedría(Sp).
Definition
The point group of a crystal is called tetartohedry if it is a subgroup of index 4 of the point group of its lattice.
See also
- Chapter 3.2.1 of International Tables for Crystallography, Volume A, 6th edition