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Topological analyses of cuprite, Cu2O, using high-energy synchrotron-radiation data
1Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22603 Hamburg, Germany. thomas.lippmann@desy.de.
Acta Crystallographica. Section A, Foundations of Crystallography
|November 4, 2000
Summary
Topological analyses of cuprite (Cu2O) using synchrotron radiation data reveal the ionic nature of the copper-oxygen bond. Charge density minima were consistently found at the empty tetrahedral sites.
Area of Science:
- Solid-state chemistry
- Crystallography
- Materials science
Background:
- Cuprite (Cu2O) is a semiconductor with a unique crystal structure.
- Understanding the electronic structure and bonding in cuprite is crucial for its applications.
Purpose of the Study:
- To perform topological analyses on cuprite using high-energy synchrotron radiation data.
- To investigate the charge density distribution and bonding characteristics.
Main Methods:
- Topological analysis of room-temperature and low-temperature synchrotron data.
- Application of single-exponential and analytical functions within the multipole model.
- Evaluation of electrostatic potential and Laplacian.
Main Results:
- Small differences observed between refinements of room-temperature and low-temperature data.
- Data suitability confirmed for detailed electronic structure analysis.
- Strong evidence for the ionic character of the copper-oxygen bond.
- Consistent identification of charge density minima at 'empty' tetrahedral sites.
Conclusions:
- The study confirms the ionic nature of the Cu-O bond in cuprite.
- Topological analysis provides valuable insights into the electronic structure of cuprite.
- The findings support further investigations into cuprite's properties.
