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Preparation and Luminescence Characterization of New Carbonate (Y2(CO3)3·nH2O:Eu 3+ ) Phosphors via the Hydrothermal Route. -The new title phosphor is hydrothermally prepared by reaction of Y2O3, Eu2O3, and urea in concentrated HNO3 (pH 7 adjusted with NH4OH, autoclave, 90-210°C, 12 h). The samples are characterized by powder XRD, SEM, and photoluminescence spectroscopy. The phosphor displays an intense red emission at 615 nm under 254 nm excitation. The intensity of the emission significantly increases with increasing reaction temperatures. At the same time, the morphology of the phosphor powders changes from spherical to a rod-like shape. -(CHANG, H.-Y.; CHEN, F.-S.; LU*, C.-H.; J. Alloys Compd. 509 (2011) 41, 10014-10019, http://dx.