著者

Kengo OKA Wataru NISHIKI Miho TAKASU Naoki NOMA Mitsunobu IWASAKI

出版者

The Ceramic Society of Japan

雑誌

Journal of the Ceramic Society of Japan (ISSN:18820743)

巻号頁・発行日

vol.130, no.1, pp.35-38, 2022-01-01 (Released:2022-01-01)

参考文献数

28

被引用文献数

1

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The crystallographic parameters of fluoro-apatite A5(VO4)3F (A = Pb, Sr, and Ba) were refined by the Rietveld method. The refined parameters indicate that the F− anions in Pb5(VO4)3F occupy sites different from those in Sr5(VO4)3F and Ba5(VO4)3F. The F− anions in Pb5(VO4)3F are located around center of the Pb6 octahedra, while those for Sr5(VO4)3F and Ba5(VO4)3F are located around the center of Sr3 or Ba3 triangle. Our structural analysis suggested that this difference is attributed to the over-bonding state of F− anion in Pb5(VO4)3F. The electron density distribution for F− anions suggests the potential ionic conductivity along the c axis in Pb5(VO4)3F.