 Pr3+ O2− | |
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| Names | |
|---|---|
| IUPAC name Praseodymium(III) oxide | |
| Other names Praseodymium oxide, Praseodymium sesquioxide | |
| Identifiers | |
| ECHA InfoCard | 100.031.665 |
| EC Number |
|
| Properties | |
| Pr2O3 | |
| Molar mass | 329.813 g/mol |
| Appearance | light green solid |
| 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)[1] |
| +8994.0·10−6 cm3/mol | |
| Structure | |
| Hexagonal,hP5 | |
| P-3m1, No. 164 | |
| Thermochemistry | |
| 117.4 J•mol−1•K−1[1] | |
Std enthalpy of formation(ΔfH⦵298) | −1809.6kJ•mol−1 |
| Related compounds | |
Otheranions | Praseodymium(III) chloride Praseodymium(III) sulfide |
Othercations | Neodymium(III) oxide Promethium(III) oxide Cerium(III) oxide |
Related compounds | Uranium(VI) oxide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Praseodymium(III) oxide,praseodymium oxide orpraseodymia is thechemical compound composed ofpraseodymium andoxygen with theformula Pr2O3. It forms light greenhexagonal crystals.[1] Praseodymium(III) oxide crystallizes in themanganese(III) oxide orbixbyite structure.[2]
Praseodymium(III) oxide can be used as adielectric in combination withsilicon.[2] Praseodymium-doped glass, calleddidymiumglass, turns yellow and is used inwelding goggles because it blocksinfrared radiation. Praseodymium(III) oxide is also used to color glass and ceramics yellow.[3]For coloring ceramics, also the very dark brown mixed-valence compound praseodymium(III,IV) oxide, Pr6O11, is used.
