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Ta
Tantalum
Atomic no.:
73
Atom. weight: 180.9479
Density: 16.654
Class:
refractory metal
Melting point: 2996°C
Boiling point: 5425°C
Colour: Array
   
Discoverer: Anders Gustaf Ekeberg
Place: Upsala, Sweden
Year: 1802

Tantalum was discovered in 1802 by A.G. Ekeberg in Uppsala, Sweden. Tantalum is a shiny, silvery colored metal which is heavy, dense, malleable and ductile when pure. It is found in small quantities in minerals (generally in conjunction with niobium), and is isolated by conversion to the oxide and then the fluoro-complex, K2TaF7, from which the pure metal is obtained by electrolysis. Tantalum is extremely corrosion resistant due to the formation of an oxide film, and is also resistant to acid attack (with the exception of HF). It will react with fused alkalis and a variety of non-metals at elevated temperatures. Tantalum can be used as a replacement for platinum for laboratory apparatus which has to have good corrosion resistance, and the metal is also used within the chemical industry for similar reasons. The fluids in the human body do not react with the metal and, hence, it is used for surgical implants without rejection. Other applications include the use of tantalum carbide in cemented carbides which are used as cutting tools. The pure metal is used in the electronics industry in the manufacture of various types of electronic equipment (e.g. rectifiers, capacitors, lamp filaments, etc.). Tantalum is also used in vacuum systems as it has a high absorption rate for residual gases. It is also used as an alloying element with, for example, nickel and molybdenum, to produce alloys which have good corrosion resistance, strength and ductility.

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 Acrylic Element cube - Tantalum Ta - 50mm  Art. Nr. 004735  
Acrylic Element cube - Tantalum Ta - 50mm
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The Sensation! Acrylic Element-blocks NEW!

Tantalum Ta - Pure solid tantalum beads ~ 10 grams

The innovation! Selected element samples in amply amount embedded in 50x50x50mm first-class crystal clear acrylic (not cheap resin!) . Totally lightfast, high gloss polish. The text is embedded inside! Hand crafted! Made in the European Union! Each acrylic block is a unique and individual piece! EXTREMELY eye-catching!

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