Physical Review Letters
Metallic Phase with Long-Range Orientational Order and No Translational Symmetry
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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.
DOI: 10.1103/physrevlett.53.1951 · Publisher: American Physical Society (APS)