Structural Relationship between Icosahedral and Frank-Kasper Phases of Al-Li-Cu,

Abstract

We report on an X-ray diffraction study of the structure of the icosahedral and Frank-Kasper phases of Al5-5Li3-3Cu. It is shown that the two phases have very similar local structure up to about 20 angstroms, while the long-range structure is quite distinct. A detailed analysis of the Frank-Kasper phase suggests that the reported atomic positions and site occupations of this compound are not accurate, and the local structure of this compound is actually closer to that of the quasicrystalline unit cells proposed for the icosahedral phase. The results are consistent with the decorated quasicrystalline lattice model.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1987
Accession Number
ADA193768

Entities

People

  • G. J. Shiflet
  • S. J. Poon
  • T. Egami
  • W. Dmowski
  • Yangyang Shen

Organizations

  • University of Virginia

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Atoms
  • Crystal Lattices
  • Crystal Structure
  • Cubic Lattices
  • Diffraction
  • Distribution Functions
  • Intensity
  • Materials
  • Materials Science
  • Military Research
  • Scattering
  • Symmetry
  • Three Dimensional
  • Virginia
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Physics

Readers

  • Nanoscale Plasmonic Nanotechnology
  • Quantum Chemistry