Skip to Main content Skip to Navigation
Journal articles

Americium and trivalent Lanthanides incorporation in high-level waste glass-ceramics

Abstract : The incorporation and partitioning of americium and trivalent lanthanides were investigated in aluminoborosilicate glass-ceramics with apatite-like silicate crystals of general formula Ca$_2$(Ln,Am)$_8$(SiO$_4$)$_6$O$_2$. A microstructural and structural study of two glass-ceramics containing Am$_2$O$_3$ - La$_2$O$_3$ or Nd$_2$O$_3$ - La$_2$O$_3$, respectively, was carried out by XRD, SEM-EDS and EMPA so as to assess a comparison of Lanthanides and Actinides partitioning into apatite crystals and residual glass. Moreover, Raman analyses of residual glasses were performed to compare the role of Am and Nd on the glassy structure. Results put forward that shape, composition, Ln-Am stoichiometry and cell parameters of apatite crystals of both (Am-La) and (Nd-La) glass-ceramics are very close. This paper thus shows similar results for (Am-La) and (Nd-La) glass-ceramics in terms of apatite - glass partitioning and in terms of structural role on glassy structure. It can be therefore put forward that Nd$^{3+}$ and Am$^{3+}$ behaviors are close, either in the glass or in the crystalline structure.
Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-02418707
Contributor : Amplexor Amplexor <>
Submitted on : Thursday, December 19, 2019 - 9:46:54 AM
Last modification on : Tuesday, April 28, 2020 - 11:28:15 AM
Long-term archiving on: : Friday, March 20, 2020 - 1:27:28 PM

Files

201700000935.pdf
Files produced by the author(s)

Identifiers

Collections

CEA | DEN

Citation

I. Bardez-Giboire, A. Kidari, M. Magnin, J.-L. Dussossoy, S. Peuget, et al.. Americium and trivalent Lanthanides incorporation in high-level waste glass-ceramics. Journal of Nuclear Materials, Elsevier, 2017, 492, pp.231-238. ⟨10.1016/j.jnucmat.2017.05.045⟩. ⟨cea-02418707⟩

Share

Metrics

Record views

45

Files downloads

190