Structure of Icosahedral AlMnSi and AlMn as Determined by Extended X-Ray Absorption Fine Structure (EXAFS)

Yanjun Ma; Edward A. Stern

doi:10.1117/12.936598

12 August 1986 Structure of Icosahedral AlMnSi and AlMn as Determined by Extended X-Ray Absorption Fine Structure (EXAFS)

Yanjun Ma, Edward A. Stern

Author Affiliations +

Proceedings Volume 0690, X-Rays in Materials Analysis: Novel Applications and Recent Developments; (1986) https://doi.org/10.1117/12.936598
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

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.

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Yanjun Ma and Edward A. Stern "Structure of Icosahedral AlMnSi and AlMn as Determined by Extended X-Ray Absorption Fine Structure (EXAFS)", Proc. SPIE 0690, X-Rays in Materials Analysis: Novel Applications and Recent Developments, (12 August 1986); https://doi.org/10.1117/12.936598

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