"The 1/1 and 2/1 Approximants in the Sc – Mg – Zn Quasicrystal System. Triacontahedral Clusters as Fundamental Building Blocks" by Qisheng Lin

Article

The 1/1 and 2/1 Approximants in the Sc – Mg – Zn Quasicrystal System. Triacontahedral Clusters as Fundamental Building Blocks

Journal of the American Chemical Society

Qisheng Lin, The Ames Laboratory
John D. Corbett, Iowa State University

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Document Type

Article

Disciplines

Publication Version

Published Version

Publication Date

1-1-2006

DOI

10.1021/ja063897u

Abstract

Single-crystal structures are reported for Sc3Mg0.18(1)Zn17.73(3), the 1/1 approximant crystal (AC), and Sc11.18(9)Mg2.5(1)Zn73.6(2), the 2/1 AC, in the corresponding icosahedral quasicrystal (i-QC) system. The 1/1 AC crystallizes in space group Im3̄, a = 13.863(2) Å, Z = 8, and the 2/1 AC, in Pa3̄, a = 22.412 (2) Å, Z = 8. The latter, which is valuable in pointing the way to the QC structure, is the best ordered and refined 2/1 example to date. The fundamental building blocks in both ACs are triacontahedral clusters centered by smaller multiply endohedral Tsai-type arrays; the former are condensed through body-centered-cubic packing in the 1/1 and primitive cubic packing in the 2/1 AC. Novel prolate rhombohedra centered by Sc−Sc dimers are also generated between triacontahedra in the 2/1 AC.

Comments

This is an article from the Journal of the American Chemical Society 128 (2006): 13268, doi: 10.1021/ja063897u. Posted with permission.

American Chemical Society

2006

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Citation Information

Qisheng Lin and John D. Corbett. "The 1/1 and 2/1 Approximants in the Sc – Mg – Zn Quasicrystal System. Triacontahedral Clusters as Fundamental Building Blocks" Journal of the American Chemical Society Vol. 128 Iss. 40 (2006) p. 13268 - 13273
Available at: http://works.bepress.com/qisheng-lin/9/