Europium(III) carbonate
Chemical compound
From Wikipedia, the free encyclopedia
Europium(III) carbonate is an inorganic compound with the chemical formula Eu2(CO3)3.[2]
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| Properties | |
| Eu2(CO3)3 | |
| Molar mass | 483.961 g/mol |
| Appearance | Solid |
| Melting point | Decomposes |
| Insoluble （1.94×10−6mol/L，30℃）[1] | |
| Related compounds | |
Other cations |
Samarium(III) carbonate Gadolinium(III) carbonate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Europium(III) carbonate can be obtained by mixing and heating an aqueous solution of ammonium carbonate and europium(III) chloride.[3] A saturated carbon dioxide ammonium carbonate solution (obtained from the reaction of hydrochloric acid and ammonium carbonate solution) can also precipitate europium carbonate from a europium salt solution.[4] Other preparation methods include the thermal decomposition of europium(III) acetate[5] and the reaction of a suspension of europium(III) oxide in water and supercritical carbon dioxide.[6]
Chemical properties
Europium(III) carbonate is soluble in acid and releases carbon dioxide:[1]
- Eu2(CO3)3 + 6 H+ → 2 Eu+3 + 3 H2O + 3 CO2↑
Europium(III) carbonate decomposes at high temperatures to form europium(III) oxide:
- Eu2(CO3)3 → Eu2O3 + 3 CO2↑