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A hydrothermal process is reported for the preparation of rare earth hydroxycarbonates LnOHCO 3 (Ln=Pr, Sm, Dy, Y) with hierarchical structures, such as dumbbell nanorod clusters, stacked lamellae and patched rods. All the hydroxycarbonate samples show fluorescence, and the emission wavelengths and intensity may be different for different samples. The hydroxycarbonate samples are generally...
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