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Praseodymium sesquioxide, Pr2O3

Praseodymium sesquioxide, or praseodymia, Pr2O3, is obtained by reducing the dioxide at a red heat in a stream of hydrogen. It is a yellowish-green powder of density 6.88 (or 7.07) at 15°. When heated in the air it absorbs oxygen and becomes brown in colour.

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