Discovered by C. G. Mosander at Stockholm, Sweden.
Remarks
Silver-gray metal of the rare earth group. slowly tarnishes
in air, slowly reacts with water, dissolves in acids. Used in infrared
absorbing glass, alloys with titanium.
Diagnostic tests:
There are no simple diagnostic tests to identify erbium.
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 41 minerals with Er in the Mineralogy Database.