Regensburg 2013 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 8: Topical Session: Quasicrystals & Complex Metallic Alloys II

MM 8.4: Talk

Monday, March 11, 2013, 12:45–13:00, H25

Symmetry and Chemistry of Complex Intermetallics — •Julia Dshemuchadse and Walter Steurer — Laboratory of Crystallography, Department of Materials, ETH Zurich, Switzerland

Complex intermetallic structures can be found in many different systems and exhibit giant unit cells. They feature a number of peculiar properties, but until recently, no unifying approach has been applied to describe their structures. To achieve a deeper understanding of their building principles, we are examining the structures of complex intermetallics on three different levels. For a generalized definition, we are statistically comparing the distribution of complex intermetallics over the entirety of intermetallic structures. Secondly, we have picked out highly symmetric lattices (e.g., [1]), which feature a large number of complex structures, and analyze the distribution of different structure types within these groups, as well as their interrelations. The third step focuses on specific intermetallic systems featuring multiple complex compounds and describes their special geometries in a comparative way to reveal similarities and distinctions.

By trying to better understand complex intermetallic structures, we hope to be able to gain more profound knowledge on the formation of metallic matter in general.

[1] J. Dshemuchadse, D. Y. Jung, W. Steurer, Acta Cryst. B67, 269-292 (2011).