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Proceedings Paper

Structure of Icosahedral AlMnSi and AlMn as Determined by Extended X-Ray Absorption Fine Structure (EXAFS)
Author(s): Yanjun Ma; Edward A. Stern
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Paper Abstract

Results of Extended X-Ray Absorption Fine Structure (EXAFS) studies of aperiodic alloys of AlMn and related alloys are summarized. By comparing the EXAFS of icosahedral AlMnSi and AlMn with that of α(AlMnSi), it was found that Mn icosahedra of edge length ti 5 Å are the structure units in the icosahedral phase. The connection among these icosahedral units is different from the connection in the a phase. Comparing the Fe and Mn sites in icosahedral AlMnFeSi and decagonal AlMnFe, indicates that Fe and Mn occupy the same sites in the icosahedral phase but different sites in the decagonal phase. We discuss these results in terms of the randomly connected icosahedra model (RCI) proposed for the icosahedral phase.

Paper Details

Date Published: 12 August 1986
PDF: 6 pages
Proc. SPIE 0690, X-Rays in Materials Analysis: Novel Applications and Recent Developments, (12 August 1986); doi: 10.1117/12.936598
Show Author Affiliations
Yanjun Ma, University of Washington (United States)
Edward A. Stern, University of Washington (United States)


Published in SPIE Proceedings Vol. 0690:
X-Rays in Materials Analysis: Novel Applications and Recent Developments
Thomas W. Rusch, Editor(s)

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