A structural model of the orthorhombic C₃₁-Al₆₀Mn₁₁Ni₄approximant

Hexagonal phases consisting of icosahedral chains/networks in (0 0 1) layers in Al–Cr–Si alloys

“…The simulated [0 0 1] EDP based on this model agrees with that observed by Kim et al [12]. In this context, it should be mentioned that a chain of four interpenetrated icosahedra occurs also often in orthorhombic approximants of quasicrystals with a lattice parameter of 1.24 nm [31,32].…”

The Al-rich region of the Al–Mn–Ni alloy system. Part II. Phase equilibria at 620–1000°C

“…However, in later work [9,10] other phases were attributed to that stoichiometry (see Table 2). Small amounts of R were reported to coexist with the distorted decagonal phase (D 3 ) and the O-phase (C 3I ) in as-cast samples in [11]. In consistency with the later work [9,10] and in discrepancy with [2], our investigations provide evidence that above 620 • C a thermodynamically stable R-phase is not present in the Al-Mn-Ni alloy system.…”

Multiple quasicrystal approximants with the same lattice parameters in Al-Cr-Fe-Si alloys

“…Recently, we found that the orthorhombic (3/2, 2/1) phase, previously reported in Al-Mn-Ni2930 (named as O 1 , with a  = 3.27 nm, b  = 1.25 nm, and c  = 2.38 nm in ref. 29), Al-Mn-Pd31, Al-Cu-Fe-Cr32, and Al-Fe-Cr33, has an additional type of structural tiling in the Al-Cr-Fe-Si alloys34, which is different from the known structural tiling in Al-Mn-Ni29.…”

“…Among them, the approximants with different lattice parameters may consist of the same structural blocks, for example, the H tile for (1/0, 2/1) and (1/1, 1/1) approximants2728. On the other side, the approximants of Al-based DQCs with the same/similar lattice parameters in different alloy systems, for example, the O 1 approximants in Al-Mn-Ni29 and Al-Cu-Fe-Cr21, were found to have the same the structural blocks and tiling patterns.…”