RE(AuAl2)nAl2(AuxSi1-x)2: a new homologous series of quaternary intermetallics grown from aluminum flux

Inorganic Chemistry
Susan E Latturner, Mercouri G Kanatzidis

Abstract

The combination of early rare earth metals (La- to Gd and Yb), gold, and silicon in molten aluminum results in the formation of intermetallic compounds with four related structures, forming a new homologous series: RE[AuAl2]nAl2(AuxSi(1-x))2, with x approximately 0.5 for most of the compound and n = 0, 1, 2, and 3. Because of the highly reducing nature of the Al flux, rare earth oxides instead of metals can also be used in these reactions. These compounds grow as large plate-like crystals and have tetragonal structure types that can be viewed as intergrowths of the BaAl4 structure and antifluorite-type AuAl2 layers. REAuAl2Si materials form with the BaAl4 structure type in space group I4/mmm (cell parameters for the La analogue are a = 4.322(2) A, c = 10.750(4) A, and Z = 2). REAu2Al4Si forms in a new ordered superstructure of the KCu4S3 structure type, with space group P4/nmm and cell parameters of the La analogue of a = 6.0973(6) A, c = 8.206(1) A, and Z = 2. REAu3Al6Si forms in a new I4/mmm symmetry structure type with cell parameters of a = 4.2733(7) A, c = 22.582(5) A, and Z = 2 for RE = Eu. The end member of the series, REAu4Al8Si, forms in space group P4/mmm with cell parameters for the Yb analogue of a = 4.2294(4) A, c ...Continue Reading

References

Mar 29, 2005·Inorganic Chemistry·Marina A ZhuravlevaMercouri G Kanatzidis
Apr 20, 2005·Accounts of Chemical Research·Mercouri G Kanatzidis
Nov 1, 2005·Angewandte Chemie·Mercouri G KanatzidisWolfgang Jeitschko

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Citations

Aug 13, 2013·Inorganic Chemistry·Nicholas P Calta, Mercouri G Kanatzidis
Jun 2, 2015·Journal of Physics. Condensed Matter : an Institute of Physics Journal·N J GhimireE D Bauer
Dec 17, 2014·Journal of Physics. Condensed Matter : an Institute of Physics Journal·N J GhimireE D Bauer
Sep 15, 2010·Inorganic Chemistry·C Peter SebastianMercouri G Kanatzidis
Sep 27, 2018·Inorganic Chemistry·Quinn D GibsonMatthew J Rosseinsky
Dec 20, 2017·Accounts of Chemical Research·Susan E Latturner
Jan 21, 2011·Inorganic Chemistry·Maria ChondroudiMercouri G Kanatzidis

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