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columbite tantalite tapiolite

Tantalite Wikipedia

The mineral group tantalite [(Fe, Mn)Ta2O6] is the primary source of the chemical element tantalum. 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. However, tantalite has a much greater specific gravity than columbite (8.0+ compared to columbite's 5.2). Iron-rich tantalite is the mineral tantalite-(Fe) or ferrotantalite and manganese-rich is tantalite-(Mn) or manganotantalite.

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Columbite-Tantalite: Mineral information, data and localities.

A generic name for minerals of the Columbite/Tantalite families which are difficult to distinguish without sophisticated tests.

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(PDF) Analytical fingerprint of columbite-tantalite

Since 2006, our working group has been investigating columbite-tantalite (coltan) mineralisation, especially in Africa, also within the wider framework of establishing certified trade chains.

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The association of columbite, tantalite and tapiolite in

Wang Ru Cheng, Francois Fontan, Xu Shi Jin, Chen Xiao Ming, Pierre Monchoux; The association of columbite, tantalite and tapiolite in the Suzhou Granite, China.

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Tapiolite and similar minerals Frankensaurus

Tapiolite is similar to these minerals: Columbite, Tantalite, Pyrolusite and more. Topic. Tapiolite. Share. Minerals similar to or like Tapiolite. Black mineral series that is an ore of niobium and tantalum.

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(PDF) Chapter 9: COLTAN (columbite & tantalite), hand held

Chapter 9: COLTAN (columbite & tantalite), hand held XRF into oversight of trade. tapiolite shows a distinct preference for Fe++ and Ta o ver Mn. and Nb. Enrichment in Nb,

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