Praseodymium(III) oxalate

Last updated
Praseodymium(III) oxalate
Praseodymium(III) oxalate.svg
Names
Other names
Praseodymium oxalate, Tris(oxalato(2-))dipraseodymium
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.019.895 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 221-884-6
PubChem CID
  • InChI=1S/3C2H2O4.2Pr/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;2*+3/p-6
    Key: UHTYDNCIXKPJDA-UHFFFAOYSA-H
  • C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].[Pr+3].[Pr+3]
Properties
Pr2(C2O4)3
Molar mass 545.87
AppearanceLight green crystals
Hazards
GHS labelling:
GHS-pictogram-exclam.svg
Warning
H302, H312
P264, P270, P280, P301+P312, P302+P352, P312, P322, P330, P363, P501
Related compounds
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Praseodymium(III) oxalate is an inorganic compound, a salt of praseodymium metal and oxalic acid, with the chemical formula Pr(C2O4)3. [1] The compound forms light green crystals that are insoluble in water. It also forms crystalline hydrates.

Contents

Preparation

Praseodymium(III) oxalate precipitates out during the reaction of soluble praseodymium salts with oxalic acid:[ citation needed ]

2 Pr(NO3)3 + 3(COOH)2 → Pr2(C2O4)3 + 6 HNO3

Properties

Praseodymium(III) oxalate forms crystalline hydrates (light green crystals): Pr2(C2O4)3·(8H2O + 2.21H2O). The crystalline hydrate decomposes stepwise when heated to 800 °C (1,470 °F): [2] [3]

Pr2(C2O4)3·8H2O → Pr2(C2O4)3 + 10.21 H2O @ (49.5 °C (121.1 °F))
Pr2(C2O4)3 → Pr2CO5 + 2 CO2 + 3 CO @ (440.4 °C (824.7 °F))
Pr2CO5 → Pr2O2CO3 → Pr6O11 + 2 CO2 @ (650–800 °C (1,202–1,472 °F))

Uses

Praseodymium(III) oxalate is used as an intermediate product in the synthesis of praseodymium. It is also applied to colour some glasses and enamels. If fused with certain other materials, the compound colors glass an intense yellow. [4]

References

  1. "Praseodymium oxalate". National Institute of Standards and Technology . Retrieved 17 June 2021.
  2. Hussein, Gamal A.M. (1994-06-01). "Formation of praseodymium oxide from the thermal decomposition of hydrated praseodymium acetate and oxalate" . Journal of Analytical and Applied Pyrolysis. 29: 89–102. doi:10.1016/0165-2370(93)00782-I . Retrieved 17 June 2021.
  3. Lv, Peng; Zhang, Liangjing; Koppala, Sivasankar; Chen, Kaihua; He, Yuan; Li, Shiwei; Yin, Shaohua (2020-09-01). "Decomposition Study of Praseodymium Oxalate as a Precursor for Praseodymium Oxide in the Microwave Field". ACS Omega . 5 (34): 21338–21344. doi:10.1021/acsomega.0c00505. PMC   7469113 . PMID   32905250.
  4. "Praseodymium Oxalate 99%-99.999% from Metall Rare Earth Limited". metall.com.cn. Retrieved 17 June 2021.