Powder neutron diffraction of La-apatite under low temperature

被引：22

作者：

Matsushita, Yoshitaka ^{[1
]}

Izumi, Fujio ^{[1
]}

Kobayashi, Kiyoshi ^{[1
]}

Igawa, Naoki ^{[2
]}

Kitazawa, Hideaki ^{[1
]}

Oyama, Yukiko ^{[3
]}

Miyoshi, Shogo ^{[3
]}

Yamaguchi, Shu ^{[3
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[2] Japan Atom Energy Res Inst, Toukai, Ibaraki 3191195, Japan

[3] Univ Tokyo, Bunkyo Ku, Tokyo 1138656, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 600卷 / 01期

关键词：

Oxygen-ionic conductor; Oxyapatite; Neutron powder diffraction; Rietveld method; Low temperature; IONIC-CONDUCTIVITY; PHASES; LN=LA; GD; SM; DY; ND;

D O I：

10.1016/j.nima.2008.11.081

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The neutron powder-diffraction data of the apatite-type La-silicate La9.50Si6O26.25, was measured using JAEA-HRPD diffractometer at 10K. The Rietveld refinement on the basis of hexagonal P6(3)/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. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：319 / 321

页数：3

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