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γ-Brass polyhedral core in intermetallics: the nanocluster model.
Arina A Pankova1, Vladislav A Blatov, Gregory D Ilyushin
1Samara Center for Theoretical Materials Science (SCTMS), Samara State University , Ac. Pavlov Street 1, Samara 443011, Russia.
Inorganic Chemistry
|October 3, 2013
Summary
Researchers identified 26-atom nanoclusters of the gamma-brass (Cu5Zn8) type within thousands of cubic intermetallic crystal structures. These nanoclusters serve as fundamental building blocks, revealing patterns in their composition and atomic arrangements.
Area of Science:
- Materials Science
- Crystallography
- Computational Chemistry
Background:
- Nanoclusters, specifically the gamma-brass (Cu5Zn8) type, are increasingly recognized as crucial building units in intermetallic compounds.
- Understanding the topological and compositional regularities of these nanoclusters is essential for predicting and designing new materials.
Purpose of the Study:
- To identify and characterize 26-atom nanoclusters of the gamma-brass type within a large dataset of cubic intermetallic crystal structures.
- To explore the structural relationships and compositional patterns of these nanoclusters.
- To create a searchable database of gamma-brass nanocluster topological types.
Main Methods:
- Utilized the TOPOS program package and a recently developed algorithm for nanocluster modeling.
- Analyzed 5918 crystal structures of cubic intermetallics to identify gamma-brass type nanoclusters (0@4@22 and 0@8@18).
- Applied both the nanocluster approach (multishell structure) and the nested-polyhedra model to analyze compositional regularities.
Main Results:
- Identified 26-atom nanoclusters of the gamma-brass (Cu5Zn8) type in 5918 cubic intermetallic crystal structures.
- Established that the 0@4@22 nanocluster core is a frequent building unit across diverse intermetallic compositions and structure types.
- Discovered regularities in the chemical composition of 702 gamma-brass-type nanoclusters.
- Created a comprehensive database of all identified topological types of gamma-brass nanoclusters.
Conclusions:
- Gamma-brass type nanoclusters are prevalent and fundamental building units in cubic intermetallic compounds.
- The study provides a systematic approach to identify and classify these nanoclusters, facilitating further research in intermetallics.
- The developed database enables efficient searching for specific atomic configurations within intermetallic structures.
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