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A Sodium‐Containing Quasicrystal: Using Gold To Enhance Sodium’s Covalency in Intermetallic Compounds
Author(s) -
Smetana Volodymyr,
Lin Qisheng,
Pratt Daniel K.,
Kreyssig Andreas,
Ramazanoglu Mehmet,
Corbett John D.,
Goldman Alan I.,
Miller Gordon J.
Publication year - 2012
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201207076
Subject(s) - quasicrystal , intermetallic , icosahedral symmetry , atom (system on chip) , sodium , crystallography , phase (matter) , materials science , nanotechnology , chemistry , computer science , metallurgy , organic chemistry , alloy , embedded system
Golden opportunity : Na 13 Au 12 Ga 15 is the first Na‐containing, thermodynamically stable quasicrystal and was discovered during systematic exploration of the polar intermetallic Na–Au–Ga system. Its electron‐to‐atom ratio, 1.75, is extremely low for Bergman‐type icosahedral phases, but it is the substantial Au content that allows Hume–Rothery stabilization and promotes novel Na–Au polar–covalent interactions, which stabilize the icosahedral phase.