Tantalum

TANTALUM-NIOBIUM INTERNATIONAL STUDY CENTER
An international, non-profit association founded in 1974, involved with all aspects of the tantalum and niobium industry.
Rembar
Specialists in refractory metals and their precision fabrication. Lots of information and history of tantalum.
The Radiochemistry Society
Scientific and professional organization whose members specialize in both applied and fundamental radiochemistry, nuclear sciences and environmental concerns. Radiochemical information on every element.
Corrosion Doctors
Tantalum Corrosion information
AVX Online
Technical papers on Tantalum and Niobium Capacitors.
United States Geological Survey
Basic Information on tantalum.
Webmineral.com
Information on minerals containing Tantalum.
Lenntech
Health risks associated with Tantalum.
Wikipedia
Encyclopedia definition of Tantalum.
Elementymology & Elements Multidict - Tantalum
Information on the history and origin of element names and their translations into many different languages.