Praseodymium(III) oxide
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| Names | |
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IUPAC name
Praseodymium(III) oxide
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| Other names
Praseodymium oxide, Praseodymium sesquioxide
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| Identifiers | |
12036-32-7 
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| EC Number | 234-845-3 |
| PubChem | 165911 |
| Properties | |
| Pr2O3 | |
| Molar mass | 329.813 g/mol |
| Appearance | white hexagonal crystals |
| Density | 6.9 g/cm3 |
| Melting point | 2,183 °C (3,961 °F; 2,456 K) |
| Boiling point | 3,760 °C (6,800 °F; 4,030 K) |
| +8994.0·10−6 cm3/mol | |
| Structure | |
| Hexagonal, hP5 | |
| P-3m1, No. 164 | |
| Thermochemistry | |
| 117.4 J•mol−1•K−1 | |
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Std enthalpy of
formation (ΔfH |
-1809.6 kJ•mol−1 |
| Related compounds | |
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Other anions
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Praseodymium(III) chloride Praseodymium(III) sulfide |
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Other cations
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Neodymium(III) oxide Promethium(III) oxide Cerium(III) oxide |
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Related compounds
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Uranium(VI) oxide |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is  ?) |
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| Infobox references | |
Praseodymium(III) oxide, praseodymium oxide or Praseodymia is the chemical compound composed of praseodymium and oxygen with the formula Pr2O3. It forms white hexagonal crystals. Praseodymium(III) oxide crystallizes in the manganese(III) oxide or bixbyite structure.
Praseodymium(III) oxide can be used as a dielectric in combination with silicon. Praseodymium-doped glass, called didymium glass, turns yellow and is used in welding goggles because it blocks infrared radiation. Praseodymium(III) oxide is also used to color glass and ceramics yellow. For coloring ceramics, also the very dark brown mixed-valence compound praseodymium(III,IV)oxide, Pr6O11, is used.
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