73 Tantalum (Ta)

atomic weight 180.9, melting point 2996° C, density 16.7g/cc

There are no circulating legal tender coins made of tantalum, although it would make a nice coinage material.

Kazakhstan has recently minted some bimetallic (AgTa) and trimetallic (AgTaAu) issues commemorating the Soviet space missions.

Iles Crozet, Territories Antarctique, 20 Francs. Diameter 22mm, 6.3g, .999 pure. $25 on 5/2/2006.
Fred Zinkann fantasy issue.

Tantalum medal by Metallium, Inc. Photo used by permission.
Diameter 19 mm, 7 grams, 99.9% pure. $16 on 11/5/2006.