Abstract
The alloys Zr65Al7.5Ni10Cu7.3Fe0.2Ag10 in the amorphous and icosahedral state have been studied with 57Fe MÖssbauer spectroscopy in the temperature range 77–300 K. The average quadrupole splitting decreases with temperature as T3/2 and is significantly larger for the icosahedral alloy. The quadrupole splitting in the icosahedral alloy is the largest ever reported for a metallic system. The vibrations of the Fe atoms in both alloys are well described by a simple Debye model.
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