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Figure 2
Representations of the crystal structure of β′-AuCd: (left) the complete representation of the 12-coordinated hcp topology; (middle) a partial representation of the 10-coordinated cco topology; (right) a partial representation of the 8-coordinated bcu topology. A partial representation as a stacking of 4-coordinated sql layers is shown by balls and cylinders; one of the layers is depicted by green cylinders. The coordination polyhedron of an Au atom in the form of a distorted twinned cuboctahedron, a distorted two-capped cube or a distorted cube is shown in each picture. The dashed edges that subsequently transform the sql stacking into the bcu, cco and hcp nets are colored in blue, red and black, respectively. The Au and Cd atoms are shown as yellow and magenta balls, respectively.

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