# Difference between revisions of "Holohedry"

### From Online Dictionary of Crystallography

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== Definition == | == Definition == | ||

− | The [[point group]] of a crystal is called | + | 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> {\bar 1}, 2/m, mmm, {\bar 3}m, 4/m mm, 6/m mm, m{\bar 3}m</math>. |

== See also == | == See also == |

## Revision as of 12:49, 12 December 2016

Holoédrie (*Fr*). Holedria (*Sp*). Oloedria (*It*). 完面像 (*Ja*)

## 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] {\bar 1}, 2/m, mmm, {\bar 3}m, 4/m mm, 6/m mm, m{\bar 3}m[/math].

## See also

Section 9.1 of *International Tables of Crystallography, Volume A*