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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]
Over the past year, the M23 has made rapid advances across the mineral-rich east of DR Congo, taking areas where coltan – the ore from which tantalum is extracted – is mined.
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
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.
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 ...
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 ...
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]
Rwanda's natural resources are limited. A small mineral industry provides about 5% of foreign exchange earnings. Concentrates exist of the heavy minerals cassiterite (a primary source of tin), and coltan (used to manufacture electronic capacitors, used in consumer electronics products such as cell phones, DVD players, video game systems and ...