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The niobium-dominant mineral in coltan is columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is tantalite. [1] Tantalum from coltan is used to manufacture tantalum capacitors which are used for mobile phones, personal computers, automotive electronics, and cameras. [2]
Coltan is the colloquial name for the mineral columbite-tantalum ("col-tan"). In the early 21st century coltan mining is associated with human rights violations such as child labour, systematic exploitation of the population by governments or militant groups, exposure to toxic chemicals and other hazards as a result of lax environmental protection, and general safety laws and regulations. [1]
The mineral group tantalite [(Fe, Mn)Ta 2 O 6] is the primary source of the chemical element tantalum, a corrosion (heat and acid) resistant metal.It is chemically similar to columbite, and the two are often grouped together as a semi-singular mineral called coltan or "columbite-tantalite" in many mineral guides.
A rebel group with alleged links to Rwanda this week seized Rubaya, a mining town in eastern Congo known for producing a key mineral used in smartphones, the group said Thursday in a statement. In ...
In recent years, the M23 has seized several lucrative mining areas and a report by UN experts last December said that around 120 tonnes of coltan was being sent by the M23 to Rwanda every four weeks.
According to Keita, coltan trade from the M23-controlled Rubaya mining site is estimated to “supply over 15 percent of global tantalum production”, and “generates an estimated $300,000 in ...
Dating columbite minerals is primarily completed by uranium lead (U-Pb) dating, a slow process. Columbite has the same composition and crystal symmetry (orthorhombic) as tantalite. [6] In fact, the two are often grouped together as a semi-singular mineral series called columbite-tantalite or coltan in many mineral guides
Minerals such as cassiterite, gold, or coltan, which is used for electronic equipment and cell phones, are an important export for the Congo. A UN resolution stated that anyone supporting illegal Congolese armed groups through illicit trade of natural resources should be subjected to sanctions including travel restrictions and an assets freeze ...