Please use this identifier to cite or link to this item:
|Title:||Structural investigations of (La,Pu)PO4 monazite solid solutions: XRD and XAFS study|
|Authors:||ARINICHEVA YULIA; POPA KARIN; SCHEINOST A.C.; ROSSBERG ANDREAS; DIESTE BLANCO OLIVER; RAISON PHILIPPE; CAMBRIANI ANDREA; SOMERS JOSEPH; BOSBACH DIRK; NEUMEIER STEFAN|
|Citation:||JOURNAL OF NUCLEAR MATERIALS vol. 493 p. 404-411|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Articles in periodicals and books|
|Abstract:||A solid state method was used to synthesize La(1-x)Pu(x)PO(4) (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)PO(4)-monazite and a cubic phase (PuO(2)). Pure-phase La(1-x)Pu(x)PO(4)-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-L(III) edges confirmed the +III valence state of plutonium in the monazite solid solutions. The local environment of Pu is PuPO(4)-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.|
|JRC Directorate:||Nuclear Safety and Security|
Files in This Item:
There are no files associated with this item.
Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.