Title of article :
Powder neutron diffraction of La-apatite under low temperature
Author/Authors :
Matsushita، نويسنده , , Yoshitaka and Izumi، نويسنده , , Fujio and Kobayashi، نويسنده , , Kiyoshi and Igawa، نويسنده , , Naoki and Kitazawa، نويسنده , , Hideaki and Oyama، نويسنده , , Yukiko and Miyoshi، نويسنده , , Shogo and Yamaguchi، نويسنده , , Shu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Abstract :
The neutron powder-diffraction data of the apatite-type La-silicate La9.50Si6O26.25, was measured using JAEA-HRPD diffractometer at 10 K. The Rietveld refinement on the basis of hexagonal P63/m was successfully carried out with anisotropic thermal displacement parameters for all sites. The obtained cell parameters were a=0.971297(7) nm, and c=0.717950(6) nm. On the Rietveld refinement supported by maximum entropy method, the interstitial oxygen positions show randomly distribution around La2 site, and they may give the driving-force of high ionic conductivity to the main ionic conduction site O4.
Keywords :
Oxygen-ionic conductor , neutron powder diffraction , Rietveld method , low temperature , Oxyapatite
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
