Structure model for the τ(μ) phase in Al–Cr–Si alloys deduced from the λ phase by the strong-reflections approach

Zhang, H.; He, Z.B.; Oleynikov, P.; Zou, X.D.; Hovmöller, S.; Kuo, K.H.

doi:10.1107/S0108768105035779

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 6
Comparison of the structures of (a) τ(μ) and (b) λ phases. Both can be described by chains of interpenetrating icosahedra. (a) In τ(μ) there are five such parallel chains continuously running along the 〈100〉 directions, with the sequences 2 + 4 + 2, 3 + 4 + 3, 4 + 4 + 2, 4 + 4 + 2 and 4 + 3 + 3, respectively. (b) In λ the chains are rotated by 27° with respect to the 〈100〉 directions. The chains are interrupted at the origin. The corresponding icosahedral pairs for τ(μ) and λ are marked by red circles.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 62| Part 1| January 2006| Pages 16-25

doi:10.1107/S0108768105035779

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