Marc Armbrster’s favorite structure is:

CuAl2

CuAl2

Source: My PhD thesis :-)

Why?

The intermetallic compound CuAl2 helped to reveal that the chemical bonding depends on the elements in a series of isostructural compounds and not on the crystal struture. Besides, it is one of the best examples that simple metals like copper and aluminum can form beautiful crystal structures upon compound formation! —Marc Armbrster


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