Compositions of Al-Based Quasicrystals Interpreted by Cluster Formulae

• Authors: H. Chen , J. Qiang , Y. Wang , C. Dong
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

61.44.Br; 36.40.-c; 71.20.Lp

Discipline

• 71.20.Lp: Intermetallic compounds
• 61.44.Br: Quasicrystals
• 36.40.-c: Atomic and molecular clusters(see also 61.46.-w Nanoscale materials in condensed matter)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 2
• Pages: 446-448

Dates

published

2014-08

Contributors

author

H. Chen

• Key Laboratory of Materials Modification (Ministry of Education), Dalian University of Technology, Dalian 116024, China

author

J. Qiang

• Key Laboratory of Materials Modification (Ministry of Education), Dalian University of Technology, Dalian 116024, China

author

Y. Wang

• Key Laboratory of Materials Modification (Ministry of Education), Dalian University of Technology, Dalian 116024, China

author

C. Dong

• Key Laboratory of Materials Modification (Ministry of Education), Dalian University of Technology, Dalian 116024, China

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Identifiers

DOI

10.12693/APhysPolA.126.446