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Figure 1
The [010] projection of the crystal structure of the new ternary Al–Cu–Fe phase. The monoclinic unit cell is outlined by a red parallelogram. The tiling formed by (a) connecting transition metal atoms for the flat layer with penta­gons, rhombi, and (b) in the case of the puckered layer with elongated hexa­gons (edge length around 6.5 Å). The circled Al atoms refer to the glue atoms and the assigned minus Fe atoms mean that they are located below the middle plane position.

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