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Gold’s Structural Versatility within Complex Intermetallics: From Hume-Rothery to Zintl and even Quasicrystals

Published online by Cambridge University Press:  29 January 2013

Gordon J. Miller ,
Srinivasa Thimmaiah ,
Volodymyr Smetana ,
Andriy Palasyuk  and
Qisheng Lin
Gordon J. Miller
Affiliation:
Department of Chemistry, Iowa State University Ames Laboratory, US Department of Energy, Ames, IA 50011
Srinivasa Thimmaiah
Affiliation:
Ames Laboratory, US Department of Energy, Ames, IA 50011
Volodymyr Smetana
Affiliation:
Ames Laboratory, US Department of Energy, Ames, IA 50011
Andriy Palasyuk
Affiliation:
Department of Chemistry, Iowa State University
Qisheng Lin
Affiliation:
Ames Laboratory, US Department of Energy, Ames, IA 50011
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Abstract

Recent exploratory syntheses of polar intermetallic compounds containing gold have established gold’s tremendous ability to stabilize new phases with diverse and fascinating structural motifs. In particular, Au-rich polar intermetallics contain Au atoms condensed into tetrahedra and diamond-like three-dimensional frameworks. In Au-poor intermetallics, on the other hand, Au atoms tend to segregate, which maximizes the number of Au-heteroatom contacts. Lastly, among polar intermetallics with intermediate Au content, complex networks of icosahedra have emerged, including discovery of the first sodium-containing, Bergman-type, icosahedral quasicrystal. Gold’s behavior in this metal-rich chemistry arises from its various atomic properties, which influence the chemical bonding features of gold with its environment in intermetallic compounds. Thus, the structural versatility of gold and the accessibility of various Au fragments within intermetallics are opening new insights toward elucidating relationships among metal-rich clusters and bulk solids.

Keywords

Aucrystallographic structureelectronic structure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1517: Symposium KK – Complex Metallic Alloys , 2013 , mrsf12-1517-kk01-02
Copyright
Copyright © Materials Research Society 2013

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