Praseodymium(III) oxide

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Praseodymium(III) oxide
La2O3structure.jpg
Identifiers
CAS number 11113-81-8 YesY
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
Specific
heat capacity
C
117.4 J•mol-1•K-1[1]
Std enthalpy of
formation
ΔfHo298
-1809.6 kJ•mol-1
Related compounds
Other anions Praseodymium(III) chloride
Praseodymium(III) sulfide
Other cations Neodymium(III) oxide
Promethium(III) oxide
Cerium(III) oxide
Related compounds Uranium(VI) oxide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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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[edit]

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[edit]

  1. ^ a b c 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. ^ a b Dabrowski, Jarek; Weber, Eicke R. (2004), Predictive Simulation of Semiconductor Processing, Springer, p. 264, ISBN 978-3-540-20481-7, retrieved 2009-03-18 
  3. ^ Emsley, John (2003), Nature's Building Blocks, Oxford University Press, p. 341, ISBN 978-0-19-850340-8, retrieved 2009-03-18 
  4. ^ 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