Abstract
The structure of a cubic Al66.5Rh26.1Si 7.3 phase, which is referred as a 2/1 approximant for an icosahedral phase, was determined by means of single crystal X-ray structural analysis: space group Pm3, a = 19.935(2) Å, Mo Kα (λ = 0.71069 Å); refined as Al70.4Rh29.6, R(wR2) = 0.087(0.194) for 1391 reflections with I > 2.0σ(I). A dodecahedral atom cluster is located at the origin of a unit cell, and the corresponding atomic arrangement can be described as nine shells with a local icosahedral symmetry, by suggesting a close similarity to the dodecahedral atomic cluster of the 2/1-AlPdMnSi approximant. The 2/1-AlRhSi approximant is a second example of a simple cubic arrangement of dodecahedral atom clusters that are 20 Å in diameter.
| Original language | English |
|---|---|
| Pages (from-to) | 156-160 |
| Number of pages | 5 |
| Journal | Journal of Non-Crystalline Solids |
| Volume | 334-335 |
| DOIs | |
| Publication status | Published - 2004 Mar 15 |
| Externally published | Yes |
| Event | 8th International Conference on Quasicrystals - Bangalore, India Duration: 2002 Sep 8 → 2002 Sep 13 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry
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Sugiyama, K., Sun, W., & Hiraga, K. (2004). Crystal structure of a 2/1 cubic approximant in an Al-Rh-Si alloy. Journal of Non-Crystalline Solids, 334-335, 156-160. https://doi.org/10.1016/j.jnoncrysol.2003.11.031