From Online Dictionary of Crystallography

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Tétartoédrie (Fr). Tetartoedrie (Ge). Tetartoedria (It). 四半面像(Ja). Tetartoedría(Sp).


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