Powder neutron diffraction of La-apatite under low temperature

Matsushita, Yoshitaka*; Izumi, Fujio*; Kobayashi, Kiyoshi*; Igawa, Naoki ; Kitazawa, Hideaki*; Oyama, Yukiko*; Miyoshi, Shogo*; Yamaguchi, Shu*

The neutron powder diffraction data of the apatite-type La-silicate La $_{9.5}$ Si $_{6}$ O $_{26.25}$ was measured at 10 K and the Rietveld refinement on the basis of hexagonal P6 $_{3}$ /m was successfully carried out. The obtained cell parameters were =0.971297(7) nm, and = 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.

Language	:	English
Journal	:	Nuclear Instruments and Methods in Physics Research A
Volume	:	600
Number	:	1
Pages	:	p.319 - 321
Publication Year/Month	:	2009/02
Meeting title	:	1st J-PARC International Symposium; International Symposium on Pulsed Neutron and Muon Sciences at J-PARC 2008 (IPS '08)
Held date	:	2008/03
Location (city)	:	Mito
Location (country)	:	Japan
Patent information	:
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Paper URL	:	https://doi.org/10.1016/j.nima.2008.11.081
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Cooperating Institute	:	物質・材料研究機構

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Registration No. : BB20083029
JAEA Abstracts No. : 37000308
Paper Submission No. : 5332

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