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Ceric fluoride, CeF4

Ceric fluoride, CeF4.H2O, is obtained as a brown powder, insoluble in water, by acting upon ceric hydroxide with hydrogen fluoride and drying the residue at 100°. When heated, water, hydrogen fluoride, and possibly fluorine, are evolved. According to Brauner, the double salt 2CeF4.3KF.2H2O is produced by the action of potassium hydrogen fluoride on ceric hydroxide. Rimbach and Kilian could not obtain this salt, but have prepared a series of double salts of the type 2CeF4.MF2.7H2O, where M = Cd, Cu, Co, Ni, or Mn. They are decomposed by water.
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