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Updated: Jan 20, 2026
Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
Published on: May 20, 2018
Insights into the Local Structure of Tb-Doped KY3F10 Nanoparticles from Synchrotron X-ray Diffraction
Rodrigo U Ichikawa1, Horacio M S M D Linhares2, Inma Peral3,4
1Centro de Ciência e Tecnologia de Materiais and Centro de Lasers e Aplicações, IPEN-CNEN/SP, Instituto de Pesquisas Energéticas e Nucleares, Butantã, São Paulo, SP 05508-900, Brazil.
Abstract:
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 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. I4/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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