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Synthesis and structural aspects of quasicrystals in Mg-Al-Ag system: Mg4Al6Ag

Mukhopadhyay, NK and Chattopadhyay, K and Ranganathan, S (1989) Synthesis and structural aspects of quasicrystals in Mg-Al-Ag system: Mg4Al6Ag. In: Metallurgical Transactions. Physical Metallurgy and Material, 20 (5). pp. 805-812.

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The existence of an icosahedral phase in Mg−Al−Ag is better understood on a crystallographic basis rather than on a quantum structural diagram basis. The quasicrystalline structure is delineated in terms of quasiperiodic arrangement of Pauling triacontahedra, which can be identified in the equilibrium structure. Subtle differences in the electron diffraction patterns have been recorded compared to the ideal quasicrystalline pattern. The misalignment of spots and distortions are better attributed to higher order rational approximate structure than anisotropic phason strain. Ares of diffuse intensity have been related to the ordering among the atoms in the clusters.

Item Type: Journal Article
Publication: Metallurgical Transactions. Physical Metallurgy and Material
Publisher: Springer
Additional Information: Copyright of this article belongs to Springer.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 13 Aug 2010 06:27
Last Modified: 19 Sep 2010 06:14
URI: http://eprints.iisc.ac.in/id/eprint/31297

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