Abstract
Abstract The analysis of low-energy electron diffraction (LEED) intensities from quasicrystal surfaces requires the use of periodic model structures that contain the same structure features as the quasicrystal. In this paper, we present the analysis of LEED data from 10-fold decagonal Al–Co–Ni using the W approximant structure as the model. A preference was found for an Al-rich termination of the surface, with very little relaxation of the surface planes relative to the bulk structure. This result is similar to the results of an ab inito calculation of a similar surface structure [1]. The results are compared from earlier analyses of the same data using different structure models [2].
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