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In a joint effort utilizing modified sample preparation, microscopy, X-ray diffraction and micro-fabrication, it became possible to prepare single crystals of the "hidden" phase AlCr 2 . High-resolution X-ray diffraction analysis is described in detail for two crystals with the similar overall composition, but different degree of disorder, which seems to be the main cause for the differing unit cell parameters. Chemical bonding analysis of AlCr 2 in comparison to prototypical MoSi 2 shows pronounced differences reflecting the interchange of main group element vs. transition metal as majority component.

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The quite ‘hidden’ compound AlCr2 was isolated for the first time as micro‐fabricated single crystals. Crystal structure and chemical bonding analyses reveal largely different interactions as a consequence of the inverted coloring pattern with respect to prototypical MoSi2. More information can be found in the Full Paper by H. Borrmann et al. (DOI: 10.1002/chem.202100817).