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Related Experiment Videos

Structure solution of the basic decagonal Al-Co-Ni phase by the atomic surfaces modelling method.

Antonio Cervellino1, Torsten Haibach, Walter Steurer

  • 1Laboratory of Crystallography, Swiss Federal Institute of Technology (ETHZ) and University of Zurich, Zurich, Switzerland.

Acta Crystallographica. Section B, Structural Science
|January 31, 2002
PubMed
Summary

Researchers detailed the atomic structure of a Ni-rich Al-Co-Ni quasicrystal using atomic surfaces modeling. This technique revealed complex atomic clusters with significant disorder, crucial for understanding high-temperature stability.

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Area of Science:

  • Materials Science
  • Crystallography
  • Condensed Matter Physics

Background:

  • Quasicrystals exhibit unique atomic arrangements and properties.
  • Understanding the atomic structure of quasicrystals is key to their applications.
  • Al-Co-Ni decagonal phases are complex materials with potential technological relevance.

Purpose of the Study:

  • To solve and detail the atomic structure of a Ni-rich Al-Co-Ni decagonal phase.
  • To utilize the atomic surfaces modeling technique for quasicrystal structure determination.
  • To provide new insights into the complexity and stability of this quasicrystalline phase.

Main Methods:

  • Employed the atomic surfaces modeling technique.
  • Utilized five-dimensional superspace crystallography.

Related Experiment Videos

  • Performed structure refinement using unique reflections and parameters.

    • Main Results:

    • The first fully detailed structure solution of the Ni-rich Al-Co-Ni decagonal phase was achieved.
    • Identified recurrent, disordered atomic clusters with significant configurational entropy.
    • Observed a perfectly quasiperiodic spatial arrangement of these clusters.

    Conclusions:

    • The atomic surfaces modeling technique provides detailed insights into complex quasicrystal structures.
    • Structural disorder within clusters contributes to high configurational entropy and high-temperature stability.
    • The findings suggest a non-local, long-range interaction is essential for phase stability.