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Related Experiment Videos

Solving the crystallographic phase problem in i(AlPdMn).

K S Brown1, A A Avanesov, V Elser

  • 1Laboratory of Atomic and Solid State Physics, Cornell University, Clark Hall, Ithaca, New York 14853-2501, USA.

Physical Review Letters
|November 1, 2000
PubMed
Summary
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Researchers used a new ab initio phase determination technique to study the AlPdMn icosahedral phase. Findings reveal significant structural disorder, supporting the random tiling model for quasicrystal stabilization.

Area of Science:

  • Crystallography
  • Materials Science
  • Solid State Physics

Background:

  • The crystallographic phase problem is a significant challenge in determining atomic structures.
  • Icosahedral (i) phases, such as AlPdMn, are complex materials with unique structural properties.
  • Understanding quasicrystal stabilization is crucial for materials science applications.

Purpose of the Study:

  • To determine the average structure of the icosahedral (i) phase of AlPdMn.
  • To apply a novel ab initio phase determination technique to a complex material.
  • To investigate the structural integrity and potential disorder within i(AlPdMn).

Main Methods:

  • Application of a new ab initio phase determination technique (Acta Crystallogr. Sect. A 55, 48 (1999)).

Related Experiment Videos

  • Analysis of crystallographic data obtained from high-quality AlPdMn samples.
  • Structure solution focusing on the icosahedral phase.

    • Main Results:

    • The average structure of i(AlPdMn) was successfully solved.
    • Strong evidence of structural disorder was observed, even with high-quality samples.
    • The findings provide support for the random tiling model of quasicrystal stabilization.

    Conclusions:

    • The new ab initio phase determination method is effective for complex structures.
    • Structural disorder is a key feature of the i(AlPdMn) phase.
    • The random tiling model is a plausible explanation for quasicrystal stabilization in this system.