Tetartohedry
From Online Dictionary of Crystallography
Tétartoédrie (Fr). Tetartoedria (Sp). Tetartoedria (It). 四半面像 (Ja)
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
Section 9.1 of International Tables of Crystallography, Volume A