Crystal structure of a cubic (Formula presented) rational approximant structure for the Al-Zn-Mg icosahedral phase

K. Sugiyama, W. Sun, K. Hiraga

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The crystalline structure of a 2/1 cubic approximant phase Al17Zn37Mg46 (Pa3, a=23.1 Å) for the Al-Zn-Mg icosahedral phase has been determined by the single crystal X-ray diffraction. The structure of the present 2/1 approximant is characterized by the packing of Bergman clusters and the atomic arrangements for six successive shells are similar to those found in the 1/1 cubic approximant. However, the fourth rhombicosidodecahedral shell of the 2/1 cubic approximant indicates a rather distorted figure together with the chemical disorder. This reflects the unique packing motif of the Bergman clusters in the 2/1 cubic approximant.

Original languageEnglish
Pages (from-to)139-142
Number of pages4
JournalJournal of Alloys and Compounds
Volume342
Issue number1-2
DOIs
Publication statusPublished - 2002 Aug 14
Externally publishedYes

Keywords

  • Al-Mg-Zn
  • Crystalline approximant
  • Single-crystal X-ray diffraction
  • Structural refinement

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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