Local structure at Mn sites in icosahedral Mn-Al quasicrystals

E. A. Stern, Y. Ma, C. E. Bouldin

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Extended x-ray-absorption fine-structure measurements have been made at the Mn K edge of quasicrystalline and crystalline forms of an Al6Mn alloy. Two different quasicrystalline Mn sites are discerned to be populated in the ratio of, the golden mean, within experimental error. The more populous site is similar to that in the crystal but with bond-angle distortions and elimination of an unusually short Al-Mn bond, while the other site has additional bond-stretching distortions. The measurements together with density measurements indicate that the volume per Mn site is independent of the type of site.

Original languageEnglish
Pages (from-to)2172-2175
Number of pages4
JournalPhysical Review Letters
Issue number20
StatePublished - 1985
Externally publishedYes


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