Thorium Nitrate. The compound from which almost all other thorium compounds are produced is thorium nitrate, Th(NO3)4 · 6 H2O, which is highly soluble in water at room temperature (65 wt %). Evaporation of the aqueous solution yields the tetrahydrate (one of seven hydrates) in the form of a finely crystalline white powder

[*] R. J. Meyer, A. Gumperts: "Reinheitskriterien von Thoriumnitrat," Ber. Dtsch. Chem. Ges. 38 (1905) 817 – 825.

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