Five-dimensional structure analysis of decagonal Al₆₅Cu₂₀Co₁₅

A family of τ-inflated monoclinic Al13Co4 phases

“…From the tiling point of view, it might be suggested that a quasicrystal and a related crystalline phase consist of almost the same pentagonal structural units, tiled aperiodically in a quasicrystal and periodically in a crystal. In fact, part of the unit cell of the monoclinic All3Co4 can be found in the structure of the AI---Co decagonal quasicrystal (Steurer & Kuo, 1990). It should be pointed out that both quasicrystalline and crystalline phases have been found earlier in an AI--CoCu alloy by Hiraga, Sun & Lincoln (1991), but the edge length of pentagons was 2.0 nm.…”

“…Recently, Barbier, Tamura & Verger-Gaugry (1993) discussed the pseudo-icosahedral coordination in Al13Fe4 as a link between icosahedral and decagonal quasicrystals. Steurer & Kuo (1990) found experimentally part of the Al13Co4 unit cell in the structure of an A1-Co-Cu DQC. Since the v-inflated r 2-, v 3-and ~4-Al13C04 show more resemblance to a DQC, a detailed study of their layer structures will certainly shed some light on the understanding of the structure of a DQC and the related monoclinic AI13Co 4 phases with vinflated unit cells.…”

Structure of the pseudodecagonal Al–Co–Ni approximant PD4

“…For example, all decagonal quasicrystals and highorder approximants in the Al-Ni-Co system comprise distinct 2-nm clusters [19][20][21][22][23]. The atomic arrangement within the clusters is imposing restrictions on the arrangement of the clusters themselves, as, for example, on overlapping of clusters [24][25][26][27][28]. A detailed determination of the atomic arrangements within the 2-nm clusters is important for understanding the structure of quasicrystal.…”

Nanodomains due to Phason Defects at a Quasicrystal Surface

“…The different response in the STM contrast to changing bias reflects the existence of two types of rows. And comparison with the relevant terminations extracted from Deloudi et al model [18,19] shows that the more bias-dependent lines in Fig. 1(d) and 1(e) are pure TM rows, whereas the less bias-dependent lines are mixed Al-TM rows.…”