Open AccessInsights into the Local Structure of Tb-Doped KY3F10 Nanoparticles from Synchrotron X-ray Diffraction
Author(s) -
Rodrigo Uchida Ichikawa,
Horacio M. S. M. D. Linhares,
Inma Peral,
S.L. Baldochi,
I.M. Ranieri,
X. Turrillas,
L.G. Martinez
Publication year - 2017
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.7b00668
Subject(s) - rietveld refinement , tetragonal crystal system , nanocrystalline material , synchrotron , coprecipitation , materials science , powder diffraction , crystallography , diffraction , synchrotron radiation , pair distribution function , x ray crystallography , bond length , crystal structure , analytical chemistry (journal) , chemistry , optics , nanotechnology , physics , inorganic chemistry , chromatography , quantum mechanics
Pure and Tb-doped nanocrystalline KY 3 F 10 specimens were synthesized by coprecipitation, and portions of the samples underwent further heat treatment at 600 °C in a fluorinated atmosphere. Synchrotron X-ray diffraction patterns acquired at 30 keV allowed to determine both long- and short-range ordered structures by Rietveld and pair distribution function (PDF) analyses, respectively. PDF examination of the as-synthesized sample allowed to discern a slight deviation from the basic cubic building unit because the Y-F bond lengths could be explained in S.G. I 4/ mmm with cell parameters a = 8.1520(9) Å and c = 11.5876(29) Å, whereas Rietveld analysis could equally well fit both the cubic and tetragonal descriptions for the heat-treated specimens. Also, PDF revealed that the as-synthesized sample exhibited less structural coherence than the heat-treated one.
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