Oxalates, metal, hydrates, dehydration

The oxalate Cm2 ( 204)3 IOH2O forms when aqueous Cm(ni) and oxalic acid are mixed. The compound dehydrates in a stepwise fashion when heated in vacuo, yielding the anhydrous oxalate at 280°C, which then converts to a carbonate above 360°C [91]. Further heating leads to oxides. The hydrated oxalate dissolves readily in aqueous alkali-metal carbonate solutions [90,99]. The compound has a lower solubility than that of americium ( 0.8 mg Cm per litre at 23°C) in 0.1 m H2C2O4/O.2 M HNO3 the solubility increases rapidly with temperature. 

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