Crystal Structures of AlCr2 and MoSi2: Same Structure Type vs. Different Bonding Pattern. Issue 57 (12th July 2021)

• Record Type: Journal Article
• Authors: Milosavljević, Milica D.; Burkhardt, Ulrich; Moll, Philip J. W.; König, Markus; Borrmann, Horst; Grin, Yuri
• Is Part Of: Chemistry. Volume 27:Issue 57(2021)
• Page Start: 14209
• Page End: 14216
• Publication Date: 2021-07-12
• Subjects: crystal structure -- disorder -- focused-ion beam -- intermetallic phase -- single crystal growth; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202100817
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: 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 AlCr2 . 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 AlCr2 in comparison to prototypical MoSi2 shows pronounced differences reflecting the interchange of main group element vs. transition metal as majority component. Abstract : Hidden crystals : With a modified synthesis approach and micro‐fabrication technique, it was possible to isolate micrometer‐sized single crystals of AlCr2 from a largely polycrystalline sample. Chemical bond analysis shows close relation to elements, in contrast to a quite localized bonding pattern in the prototype, MoSi2 .