home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Epic Interactive Encyclopedia 1997
/
The_Epic_Interactive_Encyclopedia_97.iso
/
t
/
tantalum
/
infotext
< prev
Wrap
Text File
|
1992-09-02
|
668b
|
17 lines
Metallic element, symbol Ta, atomic number
73, relative atomic mass 180.95. Tantalum can
be drawn into wire with a very high melting
point and great tenacity (useful for filament
lamps subject to vibration). It is also used
in alloys, for corrosion-resistant laboratory
apparatus and chemical equipment, as a
catalyst in the manufacture of synthetic
rubber, in tools and instruments, and in
rectifiers and capacitors. It resembles
platinum when polished. It is a bluish-white
metal, ductile and malleable. It was
discovered in 1802 by Swedish chemist Anders
Ekeberg (1767-1813), and occurs chiefly in
the mineral tantalite. Tantalum carbide is an
industrial abrasive.