quasicrystal

(redirected from Quasicrystals)
Also found in: Encyclopedia.

qua·si·crys·tal

 (kwā′zī-krĭs′təl, kwä′zē-)
n.
A structural form of matter that is less orderly than a crystal and more orderly than a glass.

qua′si·crys′tal·line adj.

qua•si•crys•tal

(ˌkweɪ zaɪˈcrys tl, ˌkweɪ saɪ-, ˌkwɑ si-, -zi-)
n.
a form of solid matter whose atoms are arranged like those of a crystal but assume patterns that do not exactly repeat themselves.
[1985–90]
References in periodicals archive ?
These inadequacies of the original Penrose tiling model prompted searches for alternative ways of describing quasicrystals. One possibility involved replacing Penrose's two shapes of diamond tiles with a single type of building block.
Guth on the inflationary universe (1981), Gerd Binnig and his collaborators on scanning tunneling microscopy (1982), and Dan Shechtman and his coworkers on quasicrystals (1984).
Quasicrystals first took center stage in late 1984 when Dan Shechtman of the Israel Institute of Technology-Technion and his collaborators reported the discovery of an aluminum alloy that yielded a peculiar diffraction pattern (SN: 3/23/85, p.188).
The quasicrystals have many attractive properties, such as high hardness, low electrical and thermal conductivities, low surface energy, accompanied by low coefficient of friction, high resistance to oxidation and corrosion, and unusual optical properties that were not observed for crystalline alloys [2].
2011 Dan Shechtman "for the discovery of quasicrystals"
This graduate text introduces the mechanisms of glass formation related to the stability of the supercooled liquid, particularly the limiting of crystal nucleation and the limiting of their growth in relation to the formation of crystals and quasicrystals, and describes the structural changes that occur in metallic glasses during heating.
Here, closed-form expressions are derived for the components of the phonon and phason stresses and electric displacement and field intensity factors created around a stack of parallel shear cracks subjected to nonuniform mechanical and electric loads in one-dimensional piezoelectric quasicrystals, using an extension of the method of dislocation arrays.
Through this technique, a large variety of materials are produced such as intermetallics, extended solid solutions, quasicrystals, and amorphous phases [17].
Wiersma, "Light transport through the band-edge states of fibonacci quasicrystals," Phys.
Beta-integers and Quasicrystals. PhD thesis, Czech Technical University in Prague and Universite Paris Diderot-Paris 7, 2008.
The self-described comic book fan said she began drafting her thesis on quasicrystals -- a subset of crystals that diverge from the usual structural characteristics of crystals.