Zonal reflection conditions
- Page ID
- 17740
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The zonal reflection conditions are the general reflection conditions due to the presence of glide planes. The resulting conditions apply only to two dimensional 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.