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Tantalum (Ta)

Tantalum is a chemical element with symbol Ta an atomic number 73. A dense, ductile and very hard metal, Tantalum is most well-known for its strong resistance to corrosion by acid attack, even with aggressive acids such as Aqua Regia.

Tantalum occurs naturally in many different ores, the most common one being Tantalite. Pure tantalite (Fe, Mn, Ta2O6) is only mined in a small number of locations worldwide, mostly in Australia. Most Tantalum is mined in the form of Coltan (a mixture of Columbite and Tantalite) in Central African countries such as the Congo and Rwanda. Coltan is considered a conflict element and is currently protected under the Dodd-Frank Act, which states that all US companies must audit their supply chains and declare any conflict elements from the DRC or surrounding countries. Currently around 1,100 tonnes of Tantalum are produced per year.

The majority of its global usage is in the form of a powder for electronics applications, both as a pure metal and as an oxide. Tantalum Pentoxide has excellent capacitance properties which are vital in a wide range of consumer electronics such as phones, tablets and computers. Tantalum’s high melting point, strength and ductility have also found it a place in a range of superalloys and carbide products. Tantalum also finds niche applications in Aerospace, furnace parts and as a substitute for Platinum in situations where chemical inertness is important such as lab equipment.

ICD has a huge wealth of experience working with Tantalum, and we can currently supply it in a variety of different forms, including:

  • Tantalum sintered bar and EB Ingot
  • Tantalum or Tantalum Pentoxide(Ta2O5) power
  • Tantalite
  • Tantalum synethetic concentrates

Atomic Number


Atomic Mass


Oxidation States

5, 4, 3, 2, 1, -1, -3



Crystal Structure

Body-Centred Cubic

Melting Point


Boiling Point


E Modulus

186 GPa

G Modulus

69 GPa

Vickers Hardness

870-1200 MPa



For more information contact our sales team on +44 (0) 1709 918 120 or email