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Weidner, Eveline; Frey, Friedrich; Hradil, K. (2001): Transient ordering states in decagonal Al-Co-Ni and Al-Cu-Co-Si phases. In: Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties, Vol. 81, No. 10: pp. 2375-2389
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X-ray diffraction patterns of decagonal Al70Co15Ni15, Al72Ni12Co16 and Al62Cu20Co15Si3 show, apart from ’sharp’ reflections, prominent diffuse maxima and diffuse streaks. From an analysis of high-resolution synchrotron data, arguments are given in favour of a more uniform interpretation of all these phenomena in terms of linear phason strain and phason fluctuations. Thus structural modifications, including one-dimensional quasicrystalline domains and periodic domains (approximants) can be conveniently described as transient ordering states, depending on temperature and composition.