Abstract
An attempt was made to synthesize the fully hydrated (8–12 H2O) form of torbernite, as no account of its synthesis could be found in the literature. Two solutions were made: 4.83 g. of Cu(NO3)2·3H2O and 21.68 g. of (UO2)(NO3)2·6H2O were dissolved in 500 ml. of water; 5.52 g. of NaH2PO4·H2O was dissolved in another 500 ml. of water. Both solutions were chilled with distilled-water ice cubes before and during mixing. The two solutions were combined, and the mixture was stored in a regrigerator at 5° C. A green precipitate formed in the course of several days. It was kept in the refrigerator as a damp slurry and was used in that form as far as possible.
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