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Metallic Phase with Long-Range Orientational Order and No Translational Symmetry

1984/11/12 by D. Shechtman, I. Blech, I. A. Blech +3 · 7,069 citations
Chemistry · Earth and Planetary Sciences · Materials Science · #Bravais lattice #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Diffraction #Icosahedral symmetry #Lattice (music) #Materials science #Metastability #Phase transition #Physics #Quantum mechanics #Quasicrystal #Quasicrystal Structures and Properties #Short range order #Solidification and crystal growth phenomena #Symmetry (geometry) #Translational symmetry #nanoparticles nucleation surface interactions

paper · pdf · doi:10.1103/physrevlett.53.1951

published in Physical Review Letters 53(20), 1951-1953 (American Physical Society)

openalex publication_date 1984/11/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

We have observed a metallic solid (Al-14-at.%-Mn) with long-range orientational order, but with icosahedral point group symmetry, which is inconsistent with lattice translations. Its diffraction spots are as sharp as those of crystals but cannot be indexed to any Bravais lattice. The solid is metastable and forms from the melt by a first-order transition.

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