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A fairly soft, shiny, silvery transition metal which is highly resistant to corrosion due to an oxide layer.
 Bar Bar.
This is a piece from a slab of pure tantalum cut from scrap electrodes. Tantalum is a highly inert substance which makes it well suited to electrolytic applications. It is also frequently used as a non-contaminating material for making crucibles other containers. Tantalum has a high melting point and is surprisingly dense.
Source: scrap dealer
Size: 2"
Purity: 99.9%
 Electrodes Electrodes.
These sintered tantalum electrodes are used for electrochemistry in highly corrosive solutions.
Source: donated by Anthony Lipmann
Size: 1"
Purity: n/a
 Manganotantalite Manganotantalite.
Manganotantalite is a heavy oxide of manganese and tantalum which is mined as an ore of tantalum, although it is not the most important. It is black, brown, reddish-brown or red with a sub-metallic lustre and occurs disseminated through granite, massive, granular or as well formed crystals.
Source: Mackay mineral collection
Size: 2"
Purity: 70%