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Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in coltan is columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is tantalite. [1]
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 Rubaya mines, also known as the Bibatama Mining Concession, is a series of coltan mining sites near the town of Rubaya [1] in Masisi Territory, North Kivu, Democratic Republic of the Congo. Officially, the mining license is held by Société Minière de Bisunzu Sarl (SMB), associated with Congolese senator Édouard Mwangachuchu . [ 2 ]
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.
Columbite, also called niobite, niobite-tantalite and columbate, with a general chemical formula of (Fe II,Mn II)Nb 2 O 6, is a black mineral group that is an ore of niobium. It has a submetallic luster, a high density, and is a niobate of iron and manganese.
When coltan is refined it becomes a heat resistant powder with high permittivity. Refined coltan is a critical element in creating capacitors, which are used in a vast array of small electronic devices, especially in mobile phones, laptop computers, pagers, and other electronic devices. (This is the citation it appears to be trying to get at)
List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE.The following table is split into two groups based on whether it has a graphical visual interface or not.
Youtubers Life is a life simulation game with business simulation elements, and influences from the Game Dev Tycoon and The Sims video games. [1] [2] The player has to manage a character trying to build a career as a YouTube personality.