Structure of the Al-Rh-Cu decagonal quasicrystal: I. A unit-cell approach

X. Z. Li, K. Hiraga, K. Yubuta

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Structure of the Al-Rh-Cu decagonal quasicrystal has been studied by high-resolution electron microscopy. The high-resolution structure image shows an aperiodic tiling composed of three kinds of subunits, namely flattened hexagon, crown and five star. Therefore, a structural model of the Al-Rh-Cu decagonal quasicrystal has been constructed in a unit-cell approach, in which the atom arrangements in the subunits have been proposed. It is known that the phase has two layers in a period of 0.4 nm along the unique tenfold axis according to the previous study by electron diffraction method. The ideal model of the Al-Rh-Cu decagonal quasicrystal is proposed as periodic stacking of the layers with quasiperiodic tessellation of the three kinds of subunits, in each layer the two-colour Penrose tiling is obtained if different atom decorations for the same shape subunits are distinguished by white and black colours. Calculated images reproduces well the contrast features of the observed images, which means that the present model is basically correct. Structural relationship between the Al-Rh-Cu decagonal quasicrystal and the previously reported Al-Ni-Co decagonal quasicrytsal, which has also a period of 0.4 nm, has also been discussed.

Original languageEnglish
Pages (from-to)330-337
Number of pages8
JournalPhysica B: Condensed Matter
Volume240
Issue number4
DOIs
Publication statusPublished - 1997 Oct

Keywords

  • Al-Rh-Cu alloy
  • Decagonal quasicrystal
  • HREM

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Structure of the Al-Rh-Cu decagonal quasicrystal: I. A unit-cell approach'. Together they form a unique fingerprint.

Cite this