Abstract
For the first time, terbium-activated gadolinium tantalo-niobates were synthesized ((Gd1-xTbx)NbyTa1-yO4). The synthesis was carried out by the liquid-phase method. All studied materials had the main crystalline modification M GdNbO4. The content of impurity phases did not exceed 2-5%. The photo- and cathodoluminescence spectra were studied. Concentration quenching of the terbium ion luminescence for a series of solid solutions containing tantalum ((Gd1-xTbx)Nb0.9Ta0.1O4) occurs earlier than for pure gadolinium niobates ((Gd1-xTbx)NbO4). The obtained materials are promising for use as scintillators. Keywords: gadolinium tantalum-niobates, liquid-phase synthesis, Tb3+, luminescence, cathodoluminescence.
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