| Autor: |
A K Cheetham, C G Titcomb, B E F Fender |
| Rok vydání: |
1974 |
| Předmět: |
|
| Zdroj: |
Journal of Physics C: Solid State Physics. 7:2409-2416 |
| ISSN: |
0022-3719 |
| Popis: |
The order structure of CeD2.29 at room temperature has been determined by profile analysis of powder neutron diffraction data. A non-stoichiometric tetragonal superstructure is adopted; space group I41md, lattice parameters a=5.538(1), c=11.046(2)AA. The ideal composition of the superstructure is CeD2.5 but the fluorite phase is not ordered at this composition because of a high level of intrinsic disorder. It is presumed that the superstructure exists over a range of composition up to approximately CeD2.4 and identical order structures have been determined in this range for LaD2.30 and PrD2.37. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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