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Synthesis and emission properties of scheelite-type LiCe(WO4)2
2016 年 124 巻 9 号 p. 938-942
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2016 年 124 巻 9 号 p. 938-942
In the present study, novel scheelite-type (tetragonal) LiCe(WO4)2 was synthesized through a solid-state reaction between Li2CO3, CeO2, and WO3. Rietveld refinement of the product indicated the presence of an almost single-phase material with crystal structure of the space group I41/a, having parameters of a = 529.4(8), c = 1149.(8), and S = 1.35. The lattice parameters show agreement with lanthanoid contraction of ionic radii. Upon excitation at 235 and 360 nm, LiCe(WO4)2 exhibits several different emissions due to the effects of Ce3+ and WO42−. The results obtained in this study indicate the possibility of a new fluorescent substance having a new crystal system.
