Synthesis, crystal structures and photoluminescence properties of new oxyborates, Mg5NbO3(BO3)3 and Mg5TaO3(BO3)3, with novel warwickite-type superstructures

Tetsuya Kawano, Hisanori Yamane

    研究成果: Article査読

    5 被引用数 (Scopus)

    抄録

    Single crystals of new oxyborates, Mg5NbO3(BO 3)3 and Mg5TaO3(BO3) 3, were prepared at 1370 °C in air using B2O 3 as a flux. They were colorless and transparent with block shapes. X-ray diffraction analysis of the single crystals revealed Mg 5NbO3(BO3)3 and Mg 5TaO3(BO3)3 to be isostructural. The X-ray diffraction reflections were indexed to the orthorhombic Pnma (No. 62) system with a=9.3682(3) Å, b=9.4344(2) Å, c=9.3379(3) Å and Z=4 for Mg5NbO3(BO3)3 and a=9.3702(3) Å, b=9.4415(3) Å, c=9.3301(2) Å and Z=4 for Mg5TaO3(BO3)3. The crystal structures of Mg5NbO3(BO3)3 and Mg5TaO3(BO3)3 are novel warwickite-type superstructures having ordered arrangements of Mg and Nb/Ta atoms. Polycrystals of Mg5NbO3(BO3)3 prepared by solid state reaction at 1200 °C in air showed broad blue-to-green emission with a peak wavelength of 470 nm under 270 nm ultraviolet excitation at room temperature.

    本文言語English
    ページ(範囲)2466-2471
    ページ数6
    ジャーナルJournal of Solid State Chemistry
    184
    9
    DOI
    出版ステータスPublished - 2011 9月

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • セラミックおよび複合材料
    • 凝縮系物理学
    • 物理化学および理論化学
    • 無機化学
    • 材料化学

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