Locally Modulated Structures of Fluorite-Related Y2O3-Nb2O5 Solid Solutions

R. Miida, F. Sato, M. Tanaka, H. Naito, H. Arashi

研究成果: Article査読

13 被引用数 (Scopus)

抄録

Modulated structures formed in defect fluorite-type (Y2O3)1-x(Nb2O5) x (0.21 ≤ x ≤ 0.27) solid solutions have been investigated by electron diffraction. [110] diffraction patterns showed a pair of diffuse spots in the [112] direction at both sides of the 1/21/21/2 reciprocal-lattice point. The distance between the diffuse spots decreased from 0.064 to 0.045 Å-1 with increasing x from 0.21 to 0.27. High-resolution electron microscopy images revealed the existence of small domains with an antiphase structure. The two-dimensional antiphase structure projected on the (110) plane is described by compositional waves of Y3+/Nb5+ and O2-/vacancy and displacive waves of Y3+ + Nb5+ and O2- along the [112] direction. The composition at cation sites is expressed by a sinusoidal wave with occupation changes between Y and 0.58Y + 0.42Nb. The occupation probability of O at anion sites is also expressed by a sinusoidal wave with occupation changes between 0.806 and 0.904. Amplitudes of the displacive waves for anions and cations were determined to be about 0.3 and 0.02 Å, respectively.

本文言語English
ページ(範囲)272-279
ページ数8
ジャーナルJournal of Applied Crystallography
30
3
DOI
出版ステータスPublished - 1997 6月 1
外部発表はい

ASJC Scopus subject areas

  • 生化学、遺伝学、分子生物学(全般)

フィンガープリント

「Locally Modulated Structures of Fluorite-Related Y2O3-Nb2O5 Solid Solutions」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル