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Praseodymium dioxide

Names
IUPAC name Praseodymium(IV) oxide
Identifiers
CAS Number	12036-05-4
3D model (JSmol)	Interactive image
ChemSpider	74758
ECHA InfoCard	100.031.658
EC Number	234-838-5
PubChem CID	82846
CompTox Dashboard (EPA)	DTXSID0065191
InChI InChI=1S/2O.PrKey: BOWRJOSABXTXBI-UHFFFAOYSA-N
SMILES O==O
Properties
Chemical formula	PrO2
Molar mass	172.91
Appearance	Dark brownish crystal
Structure
Crystal structure	Fluorite structure
Space group	Fm3m (No. 225)
Lattice constant	a = 539.3 pm
Formula units (Z)	4
Related compounds
Related compounds	Praseodymium(III) oxide Praseodymium(III,IV) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Praseodymium(IV) oxide is an inorganic compound with chemical formula PrO₂.

Production

Praseodymium(IV) oxide can be produced by boiling Pr₆O₁₁ in water or acetic acid:

Pr₆O₁₁ + 3 H₂O → 4 PrO₂ + 2 Pr(OH)₃

Chemical reactions

Praseodymium(IV) oxide starts to decompose at 320~360 °C, liberating oxygen.

References

1. ^ Chinese: 《无机化学丛书》.第七卷 钪 稀土元素. 科学出版社. 1.3.4 氧化态+4的化合物. P_193~195
2. Kern, Sanford (1964). "Magnetic Susceptibility of Praseodymium Oxides". The Journal of Chemical Physics. 40 (1). AIP Publishing: 208–212. Bibcode:1964JChPh..40..208K. doi:10.1063/1.1724864. ISSN 0021-9606.

• Praseodymium compounds
• Oxides
• Fluorite crystal structure