Discovered by G. Urnain at Paris, France, and independently
by C. James at the University of New Hampshire, USA.
Remarks
Hardest, densest, and one of the rarest of the lanthanide
metals. Little used except in research.
Diagnostic tests:
There are no simple diagnostic tests to identify lutetium.
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 Lu in the Mineralogy Database.