Five-fold symmetry: Millimetre-sized quasicrystals grown from aluminium alloy
نویسندگان
چکیده
منابع مشابه
Colloidal quasicrystals with 12-fold and 18-fold diffraction symmetry.
Micelles are the simplest example of self-assembly found in nature. As many other colloids, they can self-assemble in aqueous solution to form ordered periodic structures. These structures so far all exhibited classical crystallographic symmetries. Here we report that micelles in solution can self-assemble into quasicrystalline phases. We observe phases with 12-fold and 18-fold diffraction symm...
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Recently, Dan Shechtman was awarded the Nobel-Prize for his 1984 discovery of a quasicrystalline phase with five-fold symmetry [1] in a sputtered Al-Mn alloy. While the solid-state community considered this discovery initially with great skepticism [2], as is now vividly described in many newspaper articles and in Shechtman’s Wikipedia page [3], the existence of material with such a symmetry ha...
متن کاملFive-fold symmetry in crystalline quasicrystal lattices.
To demonstrate that crystallographic methods can be applied to index and interpret diffraction patterns from well-ordered quasicrystals that display non-crystallographic 5-fold symmetry, we have characterized the properties of a series of periodic two-dimensional lattices built from pentagons, called Fibonacci pentilings, which resemble aperiodic Penrose tilings. The computed diffraction patter...
متن کاملAluminium diffusion in decagonal quasicrystals.
Aluminium is the majority element in many quasicrystals and expected to be the most mobile element, but its diffusion properties are hardly accessible to experiment. Here we investigate aluminum diffusion in decagonal Al-Ni-Co and Al-Cu-Co quasicrystals by molecular dynamics simulations, using classical effective pair potentials. Above two-thirds of the melting temperature, strong aluminum diff...
متن کاملPhysical symmetry of quasicrystals
The possibility of a physical rotational symmetry for a quasicrystal is discussed and the minimal tensorial rank which is necessary to detect such a symmetry is shown to be simply related to the order of a symmetry rotation. For icosahedral symmetry, in particular, the minimal rank is 5 which means that "ordinary" linear (i.e. first order) behaviour (in the termal, electromagnetic, déformation ...
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ژورنال
عنوان ژورنال: Nature
سال: 1986
ISSN: 0028-0836,1476-4687
DOI: 10.1038/324012a0