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VOLUME 52 (1990) | ISSUE 8 | PAGE 1053
Elastic instability and spontaneous disorder of icosahedral quasicrystals
Topological disorder in icosahedral quasicrystals is analyzed from the standpoint that this disorder results from a phase transition consisting of an elastic instability with respect to "phonon" displacements. "Phason" strain is either a conjugate order parameter or an analog of an external field in a corresponding Ginzburg-Landau expansion, depending on the particular conditions of the problem. The model proposed here satisfactorily reproduces the results of diffraction experiments on stable quasicrystals.