142. Rare-earth metal amalgams. Part IV. The isolation of europium

Chemistry and thermodynamics of europium and some of its simpler inorganic compounds and aqueous species

“…whereas Eu304 decomposes by57a,b 3Eu304(c) = 4 Eu203(c, monoclinic) + Eu(g) (3) These are the dominant thermal decomposition reactions below about 2000 K. However, EuO(g) can be detected around 1700 K and becomes the dominant vapor species above 2000 K. Eu20 and Eu202 have also been detected in the vapor phase above 2000 K, and their formation enthalpies59,60 are in fair agreement.…”

“…for several REE, but unfortunately EuOCl was not studied. Hariharan and Eick111 studied the reaction 3 EuOCl(s) = Eu203(s, monoclinic) + EuCl2(g) + Cl(g) (6) at elevated temperatures, so thermodynamic data can be derived for EuOCl(s). EuF3 forms a hemihydrate as the stable hydrated phase at room temperature, EuF3*0.5H2O.16,17b It has a solubility around 10-5 mol L-1.…”

Europium Determination in Rare Earth Mixtures

“…of 6M ammonium hydroxide to the aliquot taken for analysis. An excess must be avoided, as it has been found (4,11) that ammonia solutions show an appreciable absorption of light in the visible region. No particular advantage is gained by buffering with ammonium acetate.…”

Radiochemical processing of nuclear-reactor-produced radiolanthanides for medical applications

“…Chakravarty et al presented recently an electrochemical approach to remove the radionuclidic contaminants of europium from 153 Sm via electro-amalgamation (Fig. 13) [89,103]. An overall yield of >85% 153 Sm was obtained after the purification process.…”