title: Icosahedral clusters, icosaheral order and stability of quasicrystals-a view of metallurgy.
abstract: We review the stability of various icosahedral quasicrystals (iQc) from a metallurgical viewpoint. The stability of stable iQcs is well interpreted in terms of Hume-Rothery rules, i.e. atomic size factor and valence electron concentration, e/a. For metastable iQcs, we discuss the role of phason disorder introduced by rapid solidification, in structural stability and its interplay with chemical order and composition.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan and National Institute for Materials Science, 305-0047 Tsukuba, Japan.
authors.forename: An Pang
authors.initials: AP
authors.lastname: Tsai
keywords: icosahedral order; isodahedral cluster; phason disorder; stable quasicrystal; valence concentration