Difference between revisions of "Zonal reflection conditions"
From Online Dictionary of Crystallography
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| − | <Font color="red"> Conditions de réflexion zonales </Font> (''Fr''). Condizioni di riflessione zonali </Font>(''It'') | + | <Font color="red"> Conditions de réflexion zonales </Font> (''Fr''). <Font color="black"> Condizioni di riflessione zonali </Font>(''It'') |
== Definition == | == Definition == | ||
Revision as of 10:26, 18 April 2007
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 hk0, h0l, 0kl, 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 n k, 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 2.2.13 of International Tables of Crystallography, Volume A