A single grain of the icosahedral Al—Pd—Mn phase has been extracted from an ingot, slowly cooled from the melt by the Bridgman technique. It has an approximate size of 1·5 cm × 0·5 cm × 0·5 cm and has been fully characterized by various techniques to be of perfect icosahedral symmetry.
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Boissieu et al. (1992) studied this question.
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