# Difference between revisions of "Zonal reflection conditions"

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## Revision as of 17:04, 11 April 2017

Conditions de réflexion zonales (*Fr*). Condizioni di riflessione zonali (*It*)

## Definition

The zonal reflection conditions are the general reflection conditions due to the presence of glide planes. The resulting conditions apply only to twodimensional sets of reflections, *i.e.* to reciprocal-lattice nets containing the origin (such as *hk*0, *h*0*l*, 0*kl*, *hhl*). For instance, for a glide plane parallel to (001):

type of reflection | reflection condition | glide vector | glide plane |
---|---|---|---|

0kl | k = 2 n | b/2 | b |

l = 2 n | c/2 | c | |

k + l = 2 n | b/2 + c/2 | n | |

k + l = 4 nk, l = 2n | b/4 ± c/4 | d |

The zonal reflection conditions are listed in Table 2.2.13.2 of *International Tables of Crystallography, Volume A*.

## See also

- reflection conditions
- Section 2.1.3.13 of
*International Tables of Crystallography, Volume A*, 6^{th}edition