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.
(* - Mineral Name Is Not IMA Approved)
(! - New Dana classification added or changed from Danas New Mineralogy)
(? - IMA Discredited Mineral Species Name)
There are 34 minerals with Eu in the Mineralogy Database.