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EnglishThe local structure around the Nd3+ ions in 60%-exchanged sodium beta''-alumina was studied by X-ray absorption spectroscopy. The analysis of the Nd L3-edge experimental data shows that neodymium ions are mainly located near mid-oxygen (9d) sites. The local environment of Nd is slightly changed compared to crystallographic positions: the Nd-O(5) distance is shortened by 0.36 angstrom, while the Nd-Al (6c) is increased by 0.13 angstrom. The values of Debye-Waller factors of different coordination shells are discussed in terms of vibrational correlation.
http://hdl.handle.net/11562/434843| Titolo: | EXAFS STUDY OF ND3+-EXCHANGED BETA''-ALUMINA CRYSTAL |
| Autori interni: | MARIOTTO, Gino |
| Data di pubblicazione: | 1994 |
| Rivista: | SOLID STATE IONICS |
| Abstract: | The local structure around the Nd3+ ions in 60%-exchanged sodium beta''-alumina was studied by X-ray absorption spectroscopy. The analysis of the Nd L3-edge experimental data shows that neodymium ions are mainly located near mid-oxygen (9d) sites. The local environment of Nd is slightly changed compared to crystallographic positions: the Nd-O(5) distance is shortened by 0.36 angstrom, while the Nd-Al (6c) is increased by 0.13 angstrom. The values of Debye-Waller factors of different coordination shells are discussed in terms of vibrational correlation. |
| Handle: | http://hdl.handle.net/11562/434843 |
| Appare nelle tipologie: | 01.01 Articolo in Rivista |
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