Soft, silvery-white metal. Stable in air due to the formation of oxide film. Reacts with water to form hydrogen (H2). Used as yttrium phosphors to give red colors in television CRT screens; in X-ray filters, superconductors; super-alloys.
There are no simple diagnostic tests to identify yttrium.
X-ray fluorescence spectroscopy is commonly employed to identify and
analyze this element.
Emsley, J., 1991; THE ELEMENTS : Sec. Ed.,
Clarendon Press, Oxford, 251 p.