カルコゲン系準結晶の合成および電顕構造解析 Synthesis of the Twelvefold Quasicrystal Ta_<62>Te_<38> and its Structure Analysis by Transmission Electron Microscopy
We have synthesized a twelvefold quasicrystal Ta<SUB>62</SUB>Te<SUB>38</SUB> by non-equilibrium solid state reactions. A transmission electron microscopy study reveals that the so-called twelvefold quasicrystal Ta<SUB>62</SUB>Te<SUB>38</SUB> is a crystal subjected to the structure modulation. It is composed of two incommensurate layers rotated by 30° (or 90°) to each other about their normal. High resolution electron microscope images show the formation of commensurate domains and their discommensuration. The modulation is considered to be due to the rearrangement of atomic vacancies as a response to the occurrence of charge density waves.
日本結晶学会誌 41(2), 141-145, 1999-04-28
The Crystallographic Society of Japan