![]() | |
Names | |
---|---|
IUPAC names Europium(III) oxalate | |
Other names
| |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.019.896 |
EC Number |
|
PubChem CID | |
CompTox Dashboard (EPA) | |
| |
| |
Properties | |
Eu2(C2O4)3 | |
Molar mass | 567.985 g·mol−1 (anhydrous) 640.046 g·mol−1 (tetrahydrate) 676.077 g·mol−1 (hexahydrate) 748.138 g·mol−1 (decahydrate) |
Appearance | colourless solid [1] |
1,38 mg·l−1 [2] | |
Hazards | |
GHS labelling: | |
![]() ![]() | |
Danger | |
H314, H335 | |
P261, P280, P304+P340, P305+P351+P338, P405, 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). |
Europium(III) oxalate (Eu2(C2O4)3) is a chemical compound of europium and oxalic acid. There are different hydrates including the decahydrate, hexahydrate and tetrahydrate. [1] Europium(II) oxalate is also known. [3]
An excess of oxalate is added to a hot solution of Eu3+ cations. The resulting precipitate of Eu2(C2O4)3 ⋅ 10H2O is dried in a desiccator. [4]
Europium(III) oxide (Eu2O3) can be prepared by calcining europium(III) oxalate. [5]
The dehydration of Eu2(C2O4)3 · 10H2O occurs below 200 °C: [1]
The decomposition of this compound takes place in two stages, the first at 350 °C and the second at about 620 °C. [1] [6]
In the Mössbauer spectrum, Eu2(C2O4)3 · 10H2O shows an isomer shift of +0,26 mm/s with a line width of 2,38 mm/s, in reference to EuF3. [4] [7] The Debye temperature of Eu2(C2O4)3 is 166±15 K. [8]
Eu2(C2O4)3 · 10H2O crystallizes monoclinically in the space group of P21/c (space group no. 14) with the lattice parameters a = 1098, b = 961, c = 1004 pm and β = 114.2° with four formula units per unit cell. [9]
Nanoparticles show a line emission when excited by a light source of 393 nm, the transitions 5D0→7F1 (592 nm) and 5D0→7F2 (616 nm) can then be found in the spectrum. This can be used as a red phosphor for white LEDs. [10]
{{cite journal}}
: CS1 maint: multiple names: authors list (link){{cite book}}
: CS1 maint: multiple names: authors list (link){{cite journal}}
: CS1 maint: multiple names: authors list (link){{cite journal}}
: CS1 maint: multiple names: authors list (link){{cite journal}}
: CS1 maint: multiple names: authors list (link){{cite journal}}
: CS1 maint: multiple names: authors list (link)