Analysis of phase transition and expansion behaviour of Al 2(WO4)3 by temperature-regulated X-ray diffraction

Takuya Hashimoto, Takayuki Sugimoto, Kazuki Omoto, Nanami Kineri, Yoichiro Ogata, Kenji Tsuda

研究成果: Article査読

8 被引用数 (Scopus)

抄録

X-ray diffraction measurements of Al2(WO4), were carried out under various temperatures from 123 K to 373 K. Diffraction patterns above 273 K and below 253 K could be successfully explained as orthorhombic Pbcn (No. 60) and monoclinic P21/n (No. 14) with superstructure, respectively, which were in agreement with the results of convergent-beam electron diffraction. Thermal expansion of low-temperature monoclinic phase and slight shrinkage of high-temperature orthorhombic phase were observed from the temperature dependence of lattice constants and molar volume, showing agreement with the result of dilatometry. It is revealed that abrupt expansion of Al 2(WO4), at the structural phase transition is attributed to an abrupt increase of the c-axis, which is parallel to the 21 screw axis and perpendicular to the n-glide plane.

本文言語English
ページ(範囲)2504-2508
ページ数5
ジャーナルPhysica Status Solidi (B) Basic Research
245
11
DOI
出版ステータスPublished - 2008 11月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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