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Four new compounds AgLnW 2 O 8 (Ln = Eu, Gd, Tb and Dy) are prepared by solid-state reactions. They crystallize with a scheelite-related monoclinic symmetry. Infrared (IR) spectra show complicated absorption transitions in the region of 1000-400 cm -1 that are similar to those of AgLnMo 2 O 8 Broad excitation and emission bands of the tungstate group are...
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