TY - JOUR
T1 - Stable icosahedral quasicrystals in the Ag-In-Ca, Ag-In-Yb, Ag-In-Ca-Mg and Ag-In-Yb-Mg systems
AU - Guo, J. Q.
AU - Tsai, A. P.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/6
Y1 - 2002/6
N2 - On the basis of the idea that a quasicrystal is a compound in which the average number of valence electrons per atom is around 2.0 and that its formation is dominated by atom size, stable icosahedral quasicrystals have been successfully synthesized in Ag-In-Ca, Ag-In-Yb, Ag-In-Ca-Mg and Ag-In-Yb-Mg systems. The Ag-In-Ca and Ag-In-Yb icosahedral quasicrystals have stoichiometry around Ag42In42Ca16 and Ag42In42Yb16. The Ag-In-Ca-Mg and Ag-In-Yb-Mg quasicrystals form in the composition ranges Ag42-x/2In42-x/2Ca16Mgx (x = 0-7.5 at.%) and Ag42-x/2In42-x/2Yb16Mgx (x = 0-10 at.%). Electron diffraction studies confirmed that the icosahedral quasicrystals have a primitive lattice. The average number of valence electrons per atom in all these quasicrystals is 2.0.
AB - On the basis of the idea that a quasicrystal is a compound in which the average number of valence electrons per atom is around 2.0 and that its formation is dominated by atom size, stable icosahedral quasicrystals have been successfully synthesized in Ag-In-Ca, Ag-In-Yb, Ag-In-Ca-Mg and Ag-In-Yb-Mg systems. The Ag-In-Ca and Ag-In-Yb icosahedral quasicrystals have stoichiometry around Ag42In42Ca16 and Ag42In42Yb16. The Ag-In-Ca-Mg and Ag-In-Yb-Mg quasicrystals form in the composition ranges Ag42-x/2In42-x/2Ca16Mgx (x = 0-7.5 at.%) and Ag42-x/2In42-x/2Yb16Mgx (x = 0-10 at.%). Electron diffraction studies confirmed that the icosahedral quasicrystals have a primitive lattice. The average number of valence electrons per atom in all these quasicrystals is 2.0.
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U2 - 10.1080/09500830210135580
DO - 10.1080/09500830210135580
M3 - Article
AN - SCOPUS:0036606032
VL - 82
SP - 349
EP - 352
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
SN - 0950-0839
IS - 6
ER -