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Which alloys show decagonal quasicrystal symmetry?
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quasicrystal
Figure 1: Hexagonal lattice of atomic sites.
Decagonal quasicrystal symmetry has been observed in the following intermetallic compounds:
- Aluminum-copper-cobalt1
- Aluminum-nickel-cobalt1
These materials are characterized by tenfold rotational symmetry within two-dimensional atomic layers, while maintaining ordinary translational periodicity in the direction perpendicular to those layers.1