Abstract
When ion bombarded at room temperature, the surface of the icosahedral quasicrystal Al 70Pd 20Mn 10 converts to a cubic structure. Bombarded at elevated temperatures, the surface remains quasicrystalline but converts to a tenfold-symmetric structure. In this paper, we search for a change in the electronic properties as the structure is modified and argue a case against the Hume-Rothery rule for these alloys.
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