TY  - JOUR
AU  - Arinicheva, Yulia
AU  - Popa, Karin
AU  - Scheinost, Andreas C.
AU  - Rossberg, André
AU  - Dieste-Blanco, Oliver
AU  - Raison, Philippe
AU  - Cambriani, Andrea
AU  - Somers, Joseph
AU  - Bosbach, Dirk
AU  - Neumeier, Stefan
TI  - Structural investigations of (La,Pu)PO$_{4}$ monazite solid solutions: XRD and XAFS study
JO  - Journal of nuclear materials
VL  - 493
SN  - 0022-3115
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2017-04956
SP  - 404 - 411
PY  - 2017
AB  - A solid state method was used to synthesize La1-xPuxPO4 (x = 0.01, 0.05, 0.10, 0.15, (0.5)) solid solutions with monazite structure. XRD measurements of the compounds with x = 0.50 revealed the formation of two phases: (La,Pu)PO4-monazite and a cubic phase (PuO2). Pure-phase La1-xPuxPO4-monazite solid solutions were obtained for materials with x = 0.00–0.15 and confirmed by a linear dependence of the lattice parameters on composition according to Vegard's law. X-ray absorption spectroscopy (XAS) analysis at the Pu-LIII and La-LIII edges confirmed the +III valence state of plutonium in the monazite solid solutions. The local environment of Pu is PuPO4-like along the solid solution series, except for the longest fitted cation-cation distance, which may be an indication of cluster formation consisting of a few Pu-atoms in the La-Pu-monazite lattice.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000408044000043
DO  - DOI:10.1016/j.jnucmat.2017.06.034
UR  - https://juser.fz-juelich.de/record/835088
ER  -