A quasi-unit cell model for Al-Ni-Co Ideal Quasicrystal based on clusters with broken 10-fold symmetry

Abstract

We present new evidence supporting the quasi-unit cell description of the $A{l}_{72}N{i}_{20}C{o}_8$ decagonal quasicrystal which shows that the solid is composed of repeating, overlapping decagonal cluster columns with broken 10-fold symmetry. We propose an atomic model which gives a significantly improved fit to electron microscopy experiments compared to a previous proposal by us and to alternative proposals with 10-fold symmetric clusters.

4 pages, 4 eps figures, use epsfig.sty and revtex revised text and figures

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