The structure of Y-Al13-xCo4 (x = 0.8) analyzed by single crystal X-ray diffraction coupled with anomalous X-ray scattering

Kazumasa Sugiyama, Michiyo Genba, Kenji Hiraga, Yoshio Waseda

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8 Citations (Scopus)

Abstract

The structure of Y-Al13-xCo4 (x = 0.8) has been analyzed by single crystal X-ray diffraction: space group C2/m (No.12), a = 17.0525 (20) Å, b = 4.1059(6) Å, c = 7.5047(9) Å, β = 116.01(1)°. Y-Al13-0.8Co4 is isostructural with a ternary Y-Al13-x(Co,Ni)4 and crystallized at the Al-poor region close to Al13Co4. The distribution of Co was also confirmed by anomalous X-ray scattering (AXS) at Co K absorption edge. Present analysis revealed the Co distribution at Co(1) and Co(2) sites, only, by suggesting unique pentagonal atomic columns with a period of 4 Å different from that observed in Al11Co4.

Original languageEnglish
Pages (from-to)98-101
Number of pages4
JournalJournal of Alloys and Compounds
Volume494
Issue number1-2
DOIs
Publication statusPublished - 2010 Apr 2

Keywords

  • Al-Co system
  • Anomalous X-ray scattering
  • Approximant
  • Crystal structure
  • Y-phase

ASJC Scopus subject areas

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

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