Local structure at Mn sites in icosahedral Mn-Al quasicrystals

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 tau, the golden mean, within experimental error. The more populous...

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Bibliographic Details
Published in:Physical review letters 1985-11, Vol.55 (20), p.2172-2175
Main Authors: STERN, E. A, MA, Y, BOULDIN, C. E
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Other interactions of matter with particles and radiation
Physics
Specific materials
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Summary: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 tau, 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. (Author)
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.55.2172