Holohedry
From Online Dictionary of Crystallography
Holoédrie (Fr). Holoedrie (Ge). Oloedria(It). 完面像(Ja). Holoedría (Sp).
Definition
The point group of a crystal is called holohedral if it is identical to the point group of its lattice. The corresponding geometric crystal class is called a holohedry. In the three-dimensional space, there are seven holohedries: [math]\textstyle{ {\bar 1}, 2/m, mmm, {\bar 3}m, 4/m mm, 6/m mm, m{\bar 3}m }[/math].
See also
- Chapter 3.2.1.1 of International Tables for Crystallography, Volume A, 6th edition