quasi-crystal


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quasi-crystal

n
(General Physics) physics a group of atoms resembling a crystal but not having symmetrical plane faces
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Years later, this finding was to become of sudden interest with the discovery of the so-called quasi-crystal (7).
The book begins with the simplest of matrices--the square, orthogonal grid--and gradually ratchets up the complexity a click at a time until it arrives at Penrose patterns and quasi-crystal tilings with 10-fold symmetry.
(16.) Reimann, A, Lugscheider, E, "HVOF-Sprayed Quasi-crystal Composite Coatings for Bearing Applications." Proc.
Introduction of rare-earth metals in quasi-crystal [Al.sub.63][Cu.sub.25][Fe.sub.12] accelerates oxidation of iron and copper with formation of nano-dimensional structure of oxides.
From a 2016 summer school in San Luis Obispo, California, 10 papers showcase various recent results from the nexus of dynamical systems, fractal geometry, number theory, and quasi-crystals. The topics include a measure-theoretic result for approximation by Delone sets, self-similar tilings of fractal blow-ups, dimensions of limit sets of Kleinian groups, an overview of complex fractal dimensions: from fractal strings to fractal drums and back, and eigenvalues of the Laplacian on domains with fractal boundary.
Barka: The event 'Crystals, Forbidden Symmetries and Quasi-Crystals' was held at the Qurum Oil and Gas Exhibition Centre, to coincide with the centenary of the Nobel Prize winning physicist Max von Laue.
In fact, this sequence occurs as a "natural" answer to various apparently unrelated questions, for instance, in combinatorics, in differential geometry, in number theory (e.g., the "Prouhet-Tarry-Escott" problem), in group theory (e.g., the Burnside problem), in real analysis (e.g., the Knopp function), in the physics literature on controlled disorder and quasi-crystals, in music, in chess, in fractals, and turtle graphics (e.g., the Koch snowflake), and in many others (see Allouche and Shallit 1999 for a survey).
The width ([L.sub.a]) and height ([L.sub.c]) of the quasi-crystals are schematically shown in Fig.
Quasi-crystals: Structural, Physical & mechanical Properties, Innovations & Applications.
The nearly 200 papers consider many aspects of the synthesis, characterization, and fundamental investigations of various metastable, nanostructured, amorphous, and glassy materials, as well as quasi-crystals and bulk glassy alloys.
Twarock and Jiri Patera of the University of Montreal had previously devised mathematical models for constructing certain quasi-crystals. As soon as Twarock saw the polyoma puzzle, she began seeing connections.
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