“…In spite of extensive work for almost 20 years, there is no consensus yet on the mechanism of quasicrystalline stability. Recently Chidambaram proposed the Ôcluster-disordered glue' model for quasicrystals [2], based on the comparison of their properties with those of the related crystals or crystal approximants, and prompted by the results from positron annihilation experiments (see Ref. [3] for a review).…”