Artigo de peri??dico
Insights into the local structure of Tb-doped KY3F10 nanoparticles from Synchrotron X???ray Diffraction
Registro en:
2470-1343
08
02
10.1021/acsomega.7b00668
Autor
ICHIKAWA, RODRIGO U.
LINHARES, HORACIO M.S.M.D.
PERAL, INMA
BALDOCHI, SONIA L.
RANIERI, IZILDA M.
TURRILLAS, XAVIER
MARTINEZ, LUIS G.
Resumen
Pure and Tb-doped nanocrystalline KY3F10
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 shortrange
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. I4/mmm with cell parameters a =
8.1520(9) ?? and c = 11.5876(29) ??, 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 heattreated
one.