| 单词 | quasicrystal |
| 释义 | quasicrystal noun[C] chemistryspecializeduk/kweɪ.zaɪˈkrɪs.təl/us/kweɪ.zaɪˈkrɪs.təl/asolidsubstancewith astructurethatcontainspatternsandrepetitionbut is notfullysymmetrical(=exactlymatching)like acrystal 准晶体Geology: mineralogy
Examplesofquasicrystalquasicrystal In other words, we view a fully periodic set, or 'crystal', as a special kind of 'quasicrystal'. From theCambridge English Corpus One of the commonly used definitions of aquasicrystalis that of an atomic structure which has a discrete component in its diffraction spectrum. From theCambridge English Corpus In particular, they can be viewed as a mathematical abstraction of the set of atomic positions of a physicalquasicrystal(at zero temperature, or at a given instant of time). From theCambridge English Corpus Does there exist a nice characterization of the 'simplest' aperiodic sets, which might be used to define a notion of 'perfectly orderedquasicrystal'? From theCambridge English Corpus This naturalquasicrystalexhibits high crystalline quality, equalling the best artificial examples. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.Its underlying symmetry is also fivefold but it is not aquasicrystal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Glotzer and collaborators also hold the record for the densest tetrahedron packing and discovered that hard tetrahedrons can self-assemble into a dodecagonalquasicrystal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.It forms an aperiodic pattern known as aquasicrystal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.In order that thequasicrystalitself be aperiodic, this slice must avoid any lattice plane of the higher-dimensional lattice. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Using mathematics for construction and analysis ofquasicrystalstructures is a difficult task for most experimentalists. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.For a periodicquasicrystalapproximant with an 82-tetrahedron unit cell, they obtained a packing density as high as 85.03%. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Recently, he has helped develop a photonicquasicrystal(thequasicrystalanalogue of a photonic crystal) for efficiently trapping and manipulating light in selected wavebands. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.For a periodic crystal (as opposed to aquasicrystal), the group must also be consistent with maintenance of the three-dimensional translational symmetry that defines crystallinity. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.They are remarkable by containing micrometre-sized grains of icosahedrite, a naturally occurringquasicrystalaperiodic, yet ordered structure. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Its discovery followed a 10-year-long systematic search by scientists to find the first naturalquasicrystal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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