quasicrystal
quasicrystal
"Quasicrystal" takes a new ordered structure which has no periodicity but a long-range order with bond orientational order between the constituent atoms. Thus, the quasicrystal is totally different from amorphous. Quasicrystals have been found in many alloys composed of aluminum and two transition metals exhibiting ferromagnetic properties.
HAADF-STEM image of an Al-Mn-Pd two-dimensional quasicrystal taken
with a JEM-ARM200F at an accelerating voltage of 200 kV.
In the image, decagonal (D) structure units, star-shaped pentagonal (P) units and hexagonal (H) units are clearly seen. All the D units are joined by edge-sharing linkage, and the gaps between those D units are completely filled with P units and H units. (cf. JEOL News Vol. 50, p25 (2015))
Courtesy of the image:
Professor Emeritus K. Hiraga, Tohoku University
HAADF-STEM image of an Al-Mn-Pd two-dimensional quasicrystal taken
with a JEM-ARM200F at an accelerating voltage of 200 kV.
In the image, decagonal (D) structure units, star-shaped pentagonal (P) units and hexagonal (H) units are clearly seen. All the D units are joined by edge-sharing linkage, and the gaps between those D units are completely filled with P units and H units. (cf. JEOL News Vol. 50, p25 (2015))
Courtesy of the image:
Professor Emeritus K. Hiraga, Tohoku University
Term(s) with "quasicrystal" in the description
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