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| Titel: |
The XPS study of pyrochlore matrixes for the radioactive waste disposal |
| Auteur: |
Teterin Anton Yu. Maslakov Konstantin I. Teterin Yury A. Ivanov Kirill E. Yudintsev Sergei V. Stefanovsky Sergei V. Livshits Tatyana S. Lapina Mariya I. |
| Verschenen in: |
Nuclear technology & radiation protection |
| Paginering: | Jaargang 25 (2010) nr. 3 pagina's 157-163 |
| Jaar: |
2010 |
| Inhoud: |
Two pyrochlore ceramic samples were studied in this work. The X-ray diffraction and the scanning electron microscopy showed that the ceramics with the calculated composition CaThSn2O7 was formed by the dominating pyrochlore phase with the traces of thorianite and hematite, while the CaThZr2O7 ceramics - by the dominating pyrochlore phase with the minor admixtures of thorianite and perovskite. The real compositions of pyrochlore phases determined by the scaning electron microscopy are Ca0.88Th0.92Sn2O6.72 and Ca0.84Th0.80Zr2O6.44. On the basis of the X-ray photoelectron spectral parameters of the outer and core electrons in the binding energy range of 0-1250 eV it was found that tin, zirconium and thorium in pyrochlore are at least 93%-94% tetravalent. Sn-O and Zr-O interatomic distances in BO6-octahedrons in the pyrochlore were found to be 0.210 nm and 0.220 nm, respectively, and these octahedrons are possible to be tetragonaly distorted. |
| Uitgever: |
VINČA Institute of Nuclear Sciences (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 23 van 23 gevonden artikelen
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