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Indexed by:期刊论文

Date of Publication:2014-08-01

Journal:12th International Conference on Quasicrystals (ICQ12)

Included Journals:SCIE、EI、CPCI-S

Volume:126

Issue:2

Page Number:446-448

ISSN No.:0587-4246

Abstract:It is known previously that bulk metallic glass compositions satisfy cluster formulae [cluster](glue atom)(1,3) of 24 valence electrons as deduced from our cluster-resonance model. In the present work, it is further shown that compositions of Al-based binary and ternary quasicrystals are also explained by 24-electron cluster formulae of the types [icosahedron](glue atom)(0,1), where the icosahedral cluster is identified from a corresponding crystalline approximant according to dense atomic packing and cluster isolation criteria, and the glue atom site is either vacant for an icosahedral quasicrystal or equal to one for a decagonal quasicrystal. Ternary quasicrystals are formulated with the same formulae as their basic binary ones but the icosahedron shell sites are substituted by third elements. The 24-electron cluster formulae are then the chemical and electronic structural units of quasicrystals, mimicking the molecular formulae of chemical substances.