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Praseodymium hydroxide, Pr(OH)3

Praseodymium hydroxide, Pr(OH)3, may be obtained by double decomposition as a bright green, gelatinous precipitate. In the presence of hydrogen peroxide, ammonia produces with praseodymium salts a precipitate of hydrated praseodymium peroxide, Pr2O5.xH2O or (OH)2Pr.O.OH. The peroxide closely resembles the lanthanum compound in its properties.

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