Electron microscopy
  
12mm Symmetry
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   https://www.globalsino.com/EM/        

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Figure 1446 shows the 2-D (two-dimensional) quasiperiodic dodecagonal Stampfli-type tiling with diffraction symmetry 12mm.

Octagonal Quasicrystal
Octagonal Quasicrystal
(a)
(b)
Figure 1446. 2-D quasiperiodic dodecagonal Stampfli-type tiling with diffraction symmetry 12mm: (a) Black and white formats and (b) Same pattern as (a) but with a highlighted portion. The corresponding four basis vectors a1, a2, a3 and a4 are shown and the linear combinations of r = Σiuiai across all lattice points.

 

 
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