Abstract
A 2D quasicrystal with a twelvefold rotational axis has been found in rapidly solidified and Si alloys by means of transmission electron microscopy. The electron diffraction pattern taken along this axis shows no periodicity but a clear twelvefold orientation symmetry. The corresponding high-resolution electron-microscopic image agrees well with an aperiodic pattern consisting of squares and equilateral triangles. A structural model for this dodecagonal quasicrystal has been proposed.
- Received 21 December 1987
DOI:https://doi.org/10.1103/PhysRevLett.60.1645
©1988 American Physical Society