Discovered by P. T. Cleve at Uppsala, Sweden and
independenly by M. Delafontaine and J. L. Soret at Geneva, Switzerland.
Remarks
Silvery metal of the rare earth group. Slowly attacked by
oxygen and water, dissolves in acid. Used as flux concentrator for high
magnetic fields.
Diagnostic tests:
There are no simple diagnostic tests to identify holmium.
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 37 minerals with Ho in the Mineralogy Database.