Mysteries of icosahedral quasicrystals: how are the atoms arranged?
نویسنده
چکیده
Higher-dimensional structure analysis of quasicrystals is now possible. Yamada et al. [IUCrJ (2016), 3, 247-258] have solved the atomic structure of icosahedral ScZn7.33 including the characteristic imperfections.
منابع مشابه
How do quasicrystals grow?
Using molecular simulations, we show that the aperiodic growth of quasicrystals is controlled by the ability of the growing quasicrystal nucleus to incorporate kinetically trapped atoms into the solid phase with minimal rearrangement. In the system under investigation, which forms a dodecagonal quasicrystal, we show that this process occurs through the assimilation of stable icosahedral cluster...
متن کاملIcosahedral quasicrystals with continuous phasons
2014 A variety of models for icosahedral quasicrystals is constructed such that atoms move continuously under displacements along the phason space R3*, while their positions are separated by distances larger than some h > 0, a « hard core » diameter. The models exhibit icosahedral symmetry and the diffraction properties of perfect quasiperiodic structures. J. Phys. France 50 (1989) 3181-31...
متن کاملDirect observation of solid-state reversed transformation from crystals to quasicrystals in a Mg alloy
Phase transformation of quasicrystals is of interest in various fields of science and technology. Interestingly, we directly observed unexpected solid-state epitaxial nucleation and growth of Zn6Mg3Y icosahedral quasicrystals in a Mg alloy at about 573 K which is about 300 K below the melting point of Zn6Mg3Y, in contrast to formation of quasicrystals through solidification that was usually fou...
متن کاملA Review of Transmission Electron Microscopy of Quasicrystals—How Are Atoms Arranged?
Quasicrystals (QCs) possess rotational symmetries forbidden in the conventional crystallography and lack translational symmetries. Their atoms are arranged in an ordered but non-periodic way. Transmission electron microscopy (TEM) was the right tool to discover such exotic materials and has always been a main technique in their studies since then. It provides the morphological and crystallograp...
متن کاملMetallic–covalent bonding conversion and thermoelectric properties of Al-based icosahedral quasicrystals and approximants
In this article, we review the characteristic features of icosahedral cluster solids, metallic-covalent bonding conversion (MCBC), and the thermoelectric properties of Al-based icosahedral quasicrystals and approximants. MCBC is clearly distinguishable from and closely related to the well-known metal-insulator transition. This unique bonding conversion has been experimentally verified in 1/1-Al...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 3 شماره
صفحات -
تاریخ انتشار 2016