Improving Resolution in k and r Space: A FEFF-based Wavelet for EXAFS Data Analysis
- Research Centre Rossendorf, Institute of Radiochemistry, Dresden (Germany)
- Institute of Microelectronics Technology RAS, Chernogolovka (Russian Federation)
- Institute of Terrestrial Ecology, Swiss Federal Institute of Technology (ETH) Zurich (Switzerland)
Applying a wavelet analysis based on the Morlet mother function, we previously demonstrated the presence of both Al and Zn atoms in the first metal shell (r {approx_equal} 3 A from the central Zn atom) of Zn-Al layered double hydroxide (LDH). However, this approach was not suited to resolve the second and third metal shells (r {approx_equal} 5 - 6 A) in r and k space independently. Therefore, we developed a new FEFF-Morlet wavelet, where the EXAFS function itself, extracted from the FEFF model, is combined with the complex Morlet wavelet. With this method, we were able to distinguish the second metal shell (Zn atoms only) from the third metal shell (Zn and Al atoms), thereby proving a regular, dioctahedral distribution of Zn atoms in the hydroxide layers.
- OSTI ID:
- 21054730
- Journal Information:
- AIP Conference Proceedings, Vol. 882, Issue 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644433; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structural Differentiation between Layered Single (Ni) and Double Metal Hydroxides (Ni–Al LDHs) Using Wavelet Transformation
EXAFS Signatures of Structural Zn at Trace Levels in Layered Minerals