Serial reflection conditions
From Online Dictionary of Crystallography
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Revision as of 12:17, 9 May 2006 by GiovanniFerraris (talk | contribs)
Conditions de réflexion sériales (Fr). Condizioni di riflessione seriali </Font>(It)
Definition
The serial reflection conditions are the general reflection conditions due to the presence of screw axes. The resulting conditions apply only to onedimensional sets of reflections, i.e. reciprocal-lattice rows containing the origin (such as h00, 0k0, 00l). For instance, for a screw axis parallel to [001], the reflection conditions are:
| type of reflection | reflection condition | screw vector | screw axis |
|---|---|---|---|
| 00l | l = 2 n | c/2 | 21; 42 |
| l = 4 n | c/4 | 41; 43 | |
| 000l | l = 2 n | c/2 | 63 |
| l = 3 n | c/3 | 41; 31; 32; 62; 64 | |
| l = 6 n | c/6 | 61;65 |
The serial 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