Single quasicrystals Al_(72)Ni_(12)Co_(16) and Al_(72)Pd_(19)Mn_9 alloys have been grown by the floating-zone method and Zn_(46)Mg_(51)Ho_3 alloy by the Bridgman method. In these three systems, single quasicrystals with dimensions of the order of a centimeter have been successfully grown. X-ray diffraction and neutron diffraction show that these single quasicrystals are as good as the best crystals. We therefore assert that quasicrystals are a metallic bulk matter with a degree of order equal to that of best crystals. By quenching the liquid, we observed flat solid-liquid interface perpendicular to the growth directions in Al-Ni-Co and Al-Pd-Mn alloys.
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