Platinum - (n.) A metallic element, intermediate in value between silver
and gold, occurring native or alloyed with other metals, also as the
platinum arsenide (sperrylite). It is heavy tin-white metal which is
ductile and malleable, but very infusible, and characterized by its
resistance to strong chemical reagents. It is used for crucibles, for
stills for sulphuric acid, rarely for coin, and in the form of foil and
wire for many purposes. Specific gravity 21.5. Atomic weight 194.3.
Symbol Pt. Formerly called platina.