Praseodymium(III) oxide
| Praseodymium(III) oxide | ||
|---|---|---|
 | ||
| IUPAC name Praseodymium(III) oxide | ||
| Other names Praseodymium oxide, Praseodymium sesquioxide | ||
| Identifiers | ||
| CAS number | 11113-81-8  | |
| PubChem | 165911 | |
| EC number | 234-845-3 | |
| Properties | ||
| Molecular formula | 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 | ||
| Crystal structure | Hexagonal, hP5 | |
| Space group | P-3m1, No. 164 | |
| Thermochemistry | ||
| Std enthalpy of formation ΔfH |
-1809.6 kJ•mol-1 | |
| Specific heat capacity, C | 117.4 J•mol-1•K-1[1] | |
| Related compounds | ||
| Other anions | Praseodymium(III) chloride Praseodymium(III) sulfide | |
| Other cations | Uranium(VI) oxide Neodymium(III) oxide Promethium(III) oxide | |
(verify) (what is: / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | ||
| Infobox references | ||
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
- ↑ 1.0 1.1 1.2 Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 478, 523, ISBN 0-8493-0594-2
- ↑ 2.0 2.1 Dabrowski, Jarek; Weber, Eicke R. (2004), Predictive Simulation of Semiconductor Processing, Springer, p. 264, ISBN 978-3-540-20481-7, retrieved 2009-03-18
- ↑ Emsley, John (2003), Nature's Building Blocks, Oxford University Press, p. 341, ISBN 978-0-19-850340-8, retrieved 2009-03-18
- ↑ Krebs, Robert E. (2006), The History and Use of our Earth's Chemical Elements, Greenwood Publishing Group, p. 283, ISBN 978-0-313-33438-2, retrieved 2009-03-18
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