Praseodymium(III) sulfate

Praseodymsulfat

  • Pr2 (SO4) 3
  • Pr2 (SO4) 3 · nH2O, n = 5; 8

Green monoclinic crystals

  • 570.00 g · mol -1
  • 714.15 g · mol -1 ( octahydrate )

Fixed

2.83 g · cm -3 ( octahydrate )

Soluble in water, 170 g · l-1 (20 ° C) ( octahydrate )

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Praseodymium (III ) sulfate (Pr2 (SO4 ) 3) is a salt of the rare earth metal is praseodymium, with sulfuric acid. It forms as octahydrate green monoclinic crystals.

Representation

Octahydrate crystals may be grown from solution, obtained by dissolving powder Pr2O3 moistened with sulfuric acid. This process can be optimized by evaporation or dissolution steps involving methanol and small amounts of 2,2 '- bipyridine.

Properties

Praseodymium (III ) sulfate is stable under normal conditions. At elevated temperatures, it gradually loses water of crystallization, while pale and as anhydrous Pr2 (SO4) 3 finally becomes colorless.

The octahydrate crystallizes in the monoclinic space group C2 / c (No. 15) with lattice parameters a = 1370 pm, b = 686 pm, c = 1845 pm and β = 102.8 °, and four formula units per unit cell.

Further, a pentahydrate is known.

CAS registry number PubChem Rare earth element CRC Handbook of Chemistry and Physics
659376
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