Direct imaging of icosahedral clusters in a cubic Cd6Ca approximant crystal

Eiji Abe, An Pang Tsai

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


The structure of a cubic Cd6Ca crystal, which is constructed by a bcc packing of multiple-shell icosahedral atomic clusters and regarded as a 1/1 approximant to a binary Cd5.7Ca icosahedral quasicrystal, has been investigated using atomic-resolution annular dark-field scanning transmission electron microscopy (ADF-STEM). Direct imaging of the projected icosahedral clusters reveals no significant ADF-contrast around the cluster center, suggesting that the Cd atoms at the core of the cluster are not located at definite position such as the cubic atomic sites proposed by X-ray analysis, but distributed in a significantly disordered manner.

Original languageEnglish
Pages (from-to)190-193
Number of pages4
JournalJournal of Non-Crystalline Solids
Publication statusPublished - 2004 Mar 15
Externally publishedYes
Event8th International Conference on Quasicrystals - Bangalore, India
Duration: 2002 Sep 82002 Sep 13

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry


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