Ta - Tantalum


Atomic Number: 73
Atomic Weight: 180.947
Element Type: Transition Metal
Crystal Structure: Cubic Body Centered
Melting Point: 3017.0°C = 5462.6°F = 3290.15 K
Boiling Point: 5458.0°C = 9856.4°F = 5731.15 K
Critical Temp: °C = °F = K
Atomic Radius: 2.09 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.34 Å
Electronegativity: 1.5


(Gr. Tantalos, mythological character, father of Niobe) Discovered in 1802 by Ekeberg,but many chemists thought niobium and tantalum were identical elements until Rowe in 1844,and Marignac, in 1866, showed that niobic and tantalic acids were two different acids. Theearly investigators only isolated the impure metal. The first relatively pure ductiletantalum was produced by von Bolton in 1903. Tantalum occurs principally in the mineralcolumbite-tantalite.


Tantalum ores are found in Australia, Brazil, Mozambique, Thailand, Portugal, Nigeria,Zaire, and Canada.

xUmp Science eStore

Science Quote

Louis Pasteur Photo

'I beseech you to take interest in these sacred domains so expressively called laboratories. Ask that there be more and that they be adorned for these are the temples of the future, wealth and well-being. It is here that humanity will grow, strengthen and improve. Here, humanity will learn to read progress and individual harmony in the works of nature, while humanity's own works are all too often those of barbarism, fanaticism and destruction.'

Louis Pasteur

- All rights reserved. © Copyright '1995-'2018