On the adaptability of 1/1 cubic approximant structure in the MgAlZn system with the particular example of Mg32Al12Zn2Zn37
Résumé
Intermetallic Mg alloys are of interest in the development of light materials with specific properties and
some of them are crystalline approximants of quasicrystalline materials. Mg32Al12Zn37 single crystal
structure, cubic, Im3, a = 14.1845(1) Å, is disordered and belongs to the well known 1/1 approximant
structural type commonly called Mg32(Al1-xZnx)49 or T-phase. In this family, Mg32Al12Zn37 is a new
member remarkable for its very special composition nearby intersection of the 2/1 and 1/1 lines that
mark composition domains of cubic 2/1 and 1/1 approximants. Structural features are discussed
comparatively with literature data to emphasize the great adaptability through atom disorder of the 1/1
structure.
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