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Article
Zn13(CrxAl1−x)27 (x = 0.34–0.37): a new intermetallic phase containing icosahedra as building units
Zeitschrift für Kristallographie - Crystalline Materials
  • Srinivasa Thimmaiah, Iowa State University
  • Mi-Kyung Han, Iowa State University
  • Gordon J. Miller, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-2011
DOI
10.1524/zkri.2011.1376
Abstract

The title compounds Zn13(CrxAl1–x)27 (x = 0.34–0.37) were obtained by melting the pure elements at 923 K, and followed by a heat treatment at 723 K in a tantalum container. According to single crystal structural analysis, the title compounds crystallize in the rhombohedral system, adopting a new structure type (R-3m, a = 7.5971(8), c = 36.816(6), for crystal I). Single crystal X-ray structural analysis reveals a statistical mixing of Cr/Al in their crystallographic positions. Single crystal and powder X-ray diffraction as well as energy dispersive X-ray analyses suggested the title phase to have a narrow homogeneity range. The substructure of Zn13(CrxAl1–x)27 shows close resemblance with the Mn3Al10 structure type. A bonding analysis, through crystal orbital Hamiltonian populations (COHPs), of “Cr9Al18Zn13” as a representative composition indicated that both homo- and heteronuclear interactions are important for the stability of this new phase.

Comments

This article is from Zeitschrift für Kristallographie - Crystalline Materials 226 (2011): 557, doi:10.1524/zkri.2011.1376. Posted with permission

Copyright Owner
Oldenbourg Wissenschaftsverlag, Mu¨nchen
Language
en
File Format
application/pdf
Citation Information
Srinivasa Thimmaiah, Mi-Kyung Han and Gordon J. Miller. "Zn13(CrxAl1−x)27 (x = 0.34–0.37): a new intermetallic phase containing icosahedra as building units" Zeitschrift für Kristallographie - Crystalline Materials Vol. 226 Iss. 7 (2011) p. 557 - 567
Available at: http://works.bepress.com/gordon-miller/117/