Solid state interaction studies on binary nitrate mixtures of URANYL NITRATE HEXAHYDRATE (cas 13520-83-7) and lanthanum nitrate hexahydrate at elevated temperatures

Add time:08/09/2019    Source:sciencedirect.com

Interaction behavior of URANYL NITRATE HEXAHYDRATE (cas 13520-83-7) (UNH) and lanthanum nitrate hexahydrate (LaNH) have been investigated on the mixtures in different molar ratios of the two precursors and monitoring the reactions at elevated temperatures with thermoanalytical and X-ray diffraction measurement techniques. During the decomposition of equimolar mixture of LaNH and UNH, formation of lanthanum uranate (U0.5La0.5)O2, was seen by the temperature of 500 °C along with lanthanum oxide (La2O3) and uranium trioxide (UO3). By the temperature of 700 °C, the formation of uranium sesquioxide (U3O8) was observed along with (U0.5La0.5)O2 as end products in uranium rich mixtures. Lanthanum rich compositions decomposed by the temperature of 700 °C to give (U0.5La0.5)O2 and La2O3 as end products.

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