Tantalum - Wikipedia. Tantalite (Fe, Mn)Ta 2 O 6 is the most important mineral for tantalum extraction. Tantalite has the same mineral structure as columbite (Fe, Mn) (Ta, Nb) 2 O 6; when there is more tantalum than niobium it is called tantalite and when there is more niobium than tantalum is it called columbite (or niobite).

Children in the Democratic Republic of the Congo (DRC) engage in the worst forms of child labor, including in the forced mining of gold, tin ore (cassiterite), tantalum ore (coltan), and tungsten ore (wolframite), and are used in armed conflict, sometimes as a result of forcible recruitment or abduction by non-state armed groups.

Mineral Profiles Niobium-Tantalum – British Geological Survey. The columbite-tantalite mineral group (Figure 1) is the most mon group of Certain minerals, such as gold, tin, tungsten and colum- bite-tantalite (coltan) » Chat Online OR GO TO » Feedback Form

The Mining industry of the Democratic Republic of the Congo is a significant factor in the world's production of cobalt, copper, diamond, tantalum, tin, and gold as well It is the Democratic Republic of the Congo 's largest source of export income [Chat Online] coltan price in sierra leone

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Niobium (Columbium) and Tantalum Statistics and Information. Niobium and columbium are synonymous names for the chemical element with atomic number 41; columbium was the name given in 1801, and niobium (Nb) was the name officially designated by the International Union of …

The Democratic Republic of the Congo (DRC) has significant deposits of minerals and metals, including gold, copper, tantalum, tungsten, coltan and cobalt For more than a decade the extraction of these resources has been linked to conflict, human rights abuses and corruption Much of the mining in .

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