Mineral Species containing Europium (Eu)

Element Properties, Isotopic Compositions for Europium

**Europium (Eu) Element Properties**
Atomic Mass	151.965
Atomic Number	63
Name Origins	Named after Europe.
Year Discovered	1901
Discovery Credits	Discovered by E. A. Demarcay at Paris, France.
Remarks	Rare, and most reactive for the rare earth metals. Soft, silvery metal which reacts quickly with oxygen and water. Little used. Some used in thin-film superconductor alloy. Diagnostic tests: There are no simple diagnostic tests to identify europium. X-ray fluorescence spectroscopy is commonly employed to identify and analyze members of the Rare-Earth group elements.
References	Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also	WebElements, ChemiCool

**Naturally Occurring Isotopes**
Symbol	Isotope Mass	Isotope Nuclide Number	Isotope Number	Natural Abundance	Half-life	Half-life Units	Decay Mode	Decay Mode MeV	Decay Mode %
Eu	150.919847	63	131	47.8%		Stable
Eu	151.921742	63	132	0.0%	13.4	Days	b-,g	1.822	72%,28%
Eu	152.921225	63	133	52.2%		Stable

Europium (Eu) Minerals sorted by Descending Weight Percent

Click here for List sorted by Mineral Name

**3 Minerals containing Europium (Eu) sorted by Descending Weight Percent**
% Eu	Mineral Name	Chemical Formula	MW
0.28 % Eu	Agardite-(Ce) !	(Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O)	1,070.95
0.17 % Eu	Arapovite !	(U,Th)(Ca,Na)2(K1-x[ ]x)Si8O20·H2O, x=0.5	897.66
0.09 % Eu	Bussyite-(Ce) !	(Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4	1,329.21

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(! - New Dana Classification Number Has Been Changed or Added)
(? - IMA Discredited Mineral Species Name)
(# - Grandfathered as valid)