High-resolution electron-microscopy study and structure modeling of the stable decagonal Al-Cu-Co quasicrystal

作者：H. Chen, S. E. Burkov, Ying He, S. J. Poon, G. J. Shiflet · 发表于：Physical Review Letters · 年份：1990 · DOI：10.1103/physrevlett.65.72 · 被引用次数：57 · 研究领域：Quasicrystal Structures and Properties、Mineralogy and Gemology Studies

We report the observation of a spatial quasiperiodicity in high-resolution electron-microscope images of the thermodynamically stable decagonal ${\mathrm{Al}}_{65}$${\mathrm{Cu}}_{15}$${\mathrm{Co}}_{20}$ quasicrystal. Well defined quasiperiods consistent with decagonal symmetry and x-ray-diffraction data have been found. The structure observed is inconsistent with conventional ideal Penrose tiling. There is strong evidence for an entropy stabilization mechanism.