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@ARTICLE{Huittinen:826675,
author = {Huittinen, N. and Arinicheva, Y. and Kowalski, Piotr and
Vinograd, Victor and Neumeier, Stefan and Bosbach, D.},
title = {{P}robing structural homogeneity of
{L}a$_{1-x}${G}d$_{x}${PO}$_{4}$ monazite-type solid
solutions by combined spectroscopic and computational
studies},
journal = {Journal of nuclear materials},
volume = {486},
issn = {0022-3115},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2017-00893},
pages = {148 - 157},
year = {2017},
abstract = {Here we study the homogeneity of Eu3+-doped La1-xGdxPO4 (x
= 0, 0.11, 0.33, 0.55, 0.75, 0.92, 1) monazite-type solid
solutions by a combination of Raman and time-resolved laser
fluorescence spectroscopies (TRLFS) with complementary
quasi-random structure-based atomistic modeling studies. For
the intermediate La0.45Gd0.55PO4 composition we detected a
significant broadening of the Raman bands corresponding to
the lattice vibrations of the LnO9 polyhedron, indicating
much stronger distortion of the lanthanide cation site than
the PO4 tetrahedron. A distortion of the crystal lattice
around the dopant site was also confirmed in our TRLFS
measurements of Eu3+ doped samples, where both the half
width (FWHM) of the excitation peaks and the 7F2/7F1 ratio
derived from the emission spectra increase for intermediate
solid-solution compositions. The observed variation in FWHM
correlates well with the simulated distribution of Eu···O
bond distances within the investigated monazites. The
combined results imply that homogenous Eu3+-doped
La1-xGdxPO4 monazite-type solid solutions are formed over
the entire composition range, which is of importance in the
context of using these ceramics for immobilization of
radionuclides.},
cin = {IEK-6 / JARA-HPC},
ddc = {530},
cid = {I:(DE-Juel1)IEK-6-20101013 / $I:(DE-82)080012_20140620$},
pnm = {161 - Nuclear Waste Management (POF3-161) / BMBF-02NUK021A
- Verbundprojekt Conditioning: Grundlegende Untersuchungen
zur Immobilisierung langlebiger Radionuklide mittels Einbau
in endlagerrelevante Keramiken; Teilprojekt A
(BMBF-02NUK021A) / Investigation of the new materials for
safe management of high level nuclear waste.
$(jiek61_20131101)$ / Investigation of the new materials for
safe management of high level nuclear waste.
$(jara0038_20121101)$ / Towards controlled QCD transport
coefficients $(jara0039_20121101)$},
pid = {G:(DE-HGF)POF3-161 / G:(DE-Juel1)BMBF-02NUK021A /
$G:(DE-Juel1)jiek61_20131101$ /
$G:(DE-Juel1)jara0038_20121101$ /
$G:(DE-Juel1)jara0039_20121101$},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000397373600017},
doi = {10.1016/j.jnucmat.2017.01.024},
url = {https://juser.fz-juelich.de/record/826675},
}