Praseodymium(III) oxide
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| Names | |
|---|---|
| IUPAC name
Praseodymium(III) oxide
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| Other names
Praseodymium oxide, Praseodymium sesquioxide
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| Identifiers | |
| ECHA InfoCard | 100.031.665 |
CompTox Dashboard (EPA)
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| Properties | |
| Pr2O3 | |
| Molar mass | 329.813 g/mol |
| Appearance | white hexagonal crystals |
| Density | 6.9 g/cm3 |
| Melting point | 2183°C |
| Boiling point | 3760°C[1] |
| Structure | |
| Hexagonal, hP5 | |
| P-3m1, No. 164 | |
| Thermochemistry | |
Heat capacity (C)
|
117.4 J•mol-1•K-1[1] |
Std enthalpy of
formation (ΔfH⦵298) |
-1809.6 kJ•mol-1 |
| Related compounds | |
Other anions
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Praseodymium(III) chloride Praseodymium(III) sulfide |
Other cations
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Uranium(VI) oxide Neodymium(III) oxide Promethium(III) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Praseodymium(III) oxide or praseodymium oxide is the chemical compound composed of praseodymium and oxygen with the formula Pr2O3. It forms white hexagonal crystals[1]. Praseodymium(III) oxide crystallizes in the manganese(III) oxide or bixbyite structure[2].
Uses
Praseodymium(III) oxide can be used as a dielectric in combination with silicon[2]. Praseodymium-doped glass, called didymium glass, turns yellow and is used in welding goggles because it blocks infrared radiation. 2500 tonnes of praseodymium(III) oxide are produced worldwide each year[3]. Praseodymium(III) oxide is also used to color glass and ceramics yellow[4]. For coloring ceramics, also the very dark brown mixed-valence compound praseodymium(III,IV)oxide, Pr6O11, is used.
References
- ^ a b c Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 478, 523, ISBN 0849305942
- ^ a b Dabrowski, Jarek; Weber, Eicke R. (2004), Predictive Simulation of Semiconductor Processing, Springer, p. 264, ISBN 9783540204817, retrieved 2009-03-18
- ^ Emsley, John (2003), Nature's Building Blocks, Oxford University Press, p. 341, ISBN 9780198503408, retrieved 2009-03-18
- ^ Krebs, Robert E. (2006), The History and Use of our Earth's Chemical Elements, Greenwood Publishing Group, p. 283, ISBN 9780313334382, retrieved 2009-03-18
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