Praseodymium(III) phosphate
Chemical compound
From Wikipedia, the free encyclopedia
Praseodymium(III) phosphate is an inorganic compound with the chemical formula PrPO4.
  | |
| Identifiers | |
|---|---|
3D model (JSmol) |
|
| ChemSpider | |
| ECHA InfoCard | 100.034.740 |
| EC Number |
|
PubChem CID |
|
CompTox Dashboard (EPA) |
|
| |
| |
| Properties | |
| O4PPr | |
| Molar mass | 235.877 g·mol−1 |
| Appearance | solid |
| Hazards | |
| GHS labelling:[1] | |
 | |
| Warning | |
| H315, H319, H335 | |
| P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Preparation
Praseodymium(III) phosphate hemihydrate can be obtained by reacting praseodymium chloride and phosphoric acid:[2]
- PrCl3 + H3PO4 → PrPO4 + 3 HCl
It can also be produced by reacting silicon pyrophosphate (SiP2O7) and praseodymium(III,IV) oxide (Pr6O11) at 1200 °C.[3]
Properties
Praseodymium(III) phosphate forms light green crystals in the monoclinic crystal system, with space group P21/n and cell parameters a = 0.676 nm, b = 0.695 nm, c = 0.641 nm, β = 103.25°, Z = 4.[4][5]
It forms a crystal hydrate of the composition PrPO4·nH2O, where n < 0.5, with light green crystals of hexagonal crystal system, space group P6222, and cell parameters a = 0.700 nm, c = 0.643 nm, Z = 3.[6][7]
Praseodymium(III) phosphate reacts with sodium fluoride to obtain Na2PrF2(PO4).[8]
- PrPO4 + 2 NaF → Na2PrF2(PO4)