The synthesis of a new garnet, Er_3Li_{0.275}Nb_{0.275}Ga_{4.45}O_{12} (ErLNGG), by solid-state reaction, is reported. A comparison of the fluorescence spectra of Er^{3+} in ErLNGG, Er-doped (0.1 at.%) calcium lithium niobium gallium garnet (CLNGG), and Er(50 at.%):CLNGG is presented. The narrowing of luminescence lines suggests an ordering of the partially disordered CLNGG with the increase of erbium concentration.
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