The light figure method has been utilized for the determination of quasi-crystallographic orientations of a bulk single quasi-crystal of Al-Pd-Mn icosahedral phase. Prior to the light figure experiment, anodic etching was carried out in a solution of CH3OH+HNO3 (volume ratio 3:1), which revealed the occurrence of well-faceted micropits consisting of etch pits and microvoids on specific surface areas, showing approximately twofold, threefold or fivefold symmetry. The facet planes of the etch pits as well as those of the microvoids, when irradiated by a narrow light beam passing through a hole in the center of a screen, reflected the beam effectively, thus giving rise to a well-defined light figure with a specific symmetry on the screen. It is demonstrated that the light figure method functions effectively for the identification of principal symmetry directions of the quasi-crystal.
|Number of pages||4|
|Journal||Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers|
|Issue number||9 A|
|Publication status||Published - 2000 Sep|
ASJC Scopus subject areas
- Physics and Astronomy(all)