A new complex intermetallic phase in the system Al–Cu–Ta with familiar clusters and packing principles

Dshemuchadse, J.; Bigler, S.; Simonov, A.; Weber, T.; Steurer, W.

doi:10.1107/S2052519213012761

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

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Figure 4
Two different disordered cluster structures in hP386-Al_57.4Cu_3.6Ta_39.0. The original unit cell (left), as well as the one with an exchanged slab (right), both exhibiting ABAC stacking in the c direction. The volume affected by disorder is indicated by the dashed-line box. The A layers are comprised of F³²₆₀ clusters in both cases (blue), while the B and C layers in the original case are F³⁹₇₄ clusters, but in the disordered variant they are found to be F⁴⁰₇₆ clusters (all red), because the adjacent layer of F³²₆₀ clusters in the center of the unit cell is exchanged.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 69| Part 3| June 2013| Pages 238-248

https://doi.org/10.1107/S2052519213012761

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