The structure of an icosahedral Al-Mn quasicrystal.

This article reviewes the section method which is convenient to understand all the quasiperiodic structures including the modulated and quasicrystal structures on the same basis. A model construction of an icosahedral Al - Mn quasicrystal is examplified by use of this method. This model explains the X -ray and neutorn powder diffraction patterns of an icosahedral A14Mn.