columbite tantalite coltan

Columbite-tantalite (COLTAN) > ENGINEERING

COLTAN (Columbite-Tantalite) is a dull metallic ore found in major quantities in the eastern areas of Congo. When refined, COLTAN becomes metallic Tantalum, a heat-resistant powder that can hold a high electrical charge. Columbite ((Fe, Mn, Mg)(Nb, Ta) 2 O 6: Iron Manganese Magnesium Niobium Tantalum Oxide) is the most abundant …

Columbite SN3: A New Potential Reference

Coltan 139 and these three columbite-tantalite samples with variable compositions yielded internally consistent LA-ICP-MS U-Pb ages when using each other for calibration and the weighted mean 206 Pb/ 238 U ages are comparable to respective ID-TIMS ages. Composition-dependent U-Pb fractionation seems to be insignificant under …

Columbite-(Fe) Mineral Data

Coltan : Columbite-Tantalite : Ferrocolumbite - Renamed to Columbite-(Fe) by Mineralogical Record, v39 (2008), p 131 : Niobite : Columbite-(Fe) Image: Images: Columbite-(Fe) Microcline. Comments: Blocky, dark brown ferrocolumbite on pale greenish blue amazonite (microcline).

Columbite SN3: A New Potential Reference

Abstract. Columbite-tantalite LA-ICP-MS U-Pb dating is a fast and useful method to determine the age of rare-metal deposits and fingerprint the provenance of …

Review of Niobium-Tantalum Separation in …

Columbite, tantalite, columbite-tantalite (Coltan), pyrochlore, and euxenite constitute the major primary sources for niobium and tantalum and are located in Canada, Brazil, Nigeria, Zaire and Russia [5, 6]. These interesting elements are chemically similar and are associated with each other in nature.

Cobalt vs. Coltan — What's the Difference?

Coltan, on the other hand, is a colloquial name for columbite-tantalite, a mineral from which niobium and tantalum are extracted. Tantalum from coltan is used in electronic components, such as capacitors and high-end audio systems, due to its ability to store and release electrical energy.

Conflict Minerals Disclosure | ArcelorMittal

1. Introduction. The Democratic Republic of the Congo (DRC) is a Central African country with large natural resources, including reserves of cassiterite (tin), columbite-tantalite (aka coltan – source of tantalum), wolframite (tungsten) and gold.For many years, armed groups have fought to control mines within the DRC and its adjoining countries; those armed …

Coltan

Coltan or tantalite (short for columbite–tantalites) is a valuable mineral. It is a dull black metallic ore from which the elements niobium and tantalum are got. Tantalum from coltan is used to make tantalum capacitors which are used for mobile phones, personal computers, automotive electronics, and cameras.

Coltan: The Venezuelan Regime's Smuggling of "Blue …

Coltan is the name commonly given to columbite-tantalite, a complex mineral containing, as the name suggests, columbite and tantalite. The main component of columbite is the rare-earth metal columbium, now better known as niobium, with

Coltan and Mobile Phones: The Wonders & the Sad Truth …

Australia was initially the largest producer of columbite-tantalite in the world, closely followed by Canada and Brazil. In 2006 alone, the three countries had an 80% share of total columbite-tantalite produce. However, their production of coltan went downhill following environmental regulations and unsuccessful mining company buyouts.

Finger of conflict minerals: columbite …

PDF | On Jan 1, 2008, F. Melcher and others published Finger of conflict minerals: columbite-tantalite ("coltan") ores | Find, read and cite all the research you need on ResearchGate.

Extractive metallurgy of columbite-tantalite ore: A …

The chlorination of columbite-tantalite in the presence of a reducing carbon bed produces a mixture of volatile tantalum, niobium, iron, tin, aluminium and …

Coltan | columbite-tantalite mineral ore | Britannica

endangered species. …from the unregulated exploitation of coltan (the rare ore for tantalum used in consumer electronics products such as mobile phones and computers) in Kahuzi …

Conflict minerals report STMicroelectronics

with its consolidated subsidiaries. Furthermore, the SEC defines "conflict minerals" as columbite-tantalite (coltan), cassiterite, gold, wolframite, or their derivatives, which are limited to tantalum, tin, and tungsten. The Regulation is applicable to Union importers of certain minerals or metals, whereby (i) the

1 Key facts and figures about coltan and tantalum

Coltan is short for columbite–tantalite, a mineral containing the elements tantalum and niobium. Niobium was formerly known as columbium, hence the name columbite-tantalite. The commercial value of mined coltan is mainly determined by its tantalum content. The chapter starts with an overview of

Analytical ﬁngerprint of colu mbite-tantalite (coltan

columbite-tantalite solid solution series (abbreviated CGM, columbite-group minerals). Such concentrates contain from ten to 40 per cent Ta 2 O 5, in addition to Nb, Sn, W, Ti, U, Th, REE, Zr and other metals. Coltan has been identified as one of several raw materials that were used to finance the civil wars in central Africa. The term

Columbite Tantalite: a film that fuses Congo's past and …

In full, coltan's name is columbite-tantalite, after Tantalus, the figure in Greek mythology who was condemned to a horrifying eternal torment, of the things he most desired being just out of his ...

What is Coltan? 6 Facts You Should Know (Updated 2023)

The mineral coltan is one of the resources that is playing an important role in the technological revolution. Coltan ore itself hosts technology minerals tantalum and niobium. Brazil, Canada and ...

Coltan | columbite-tantalite mineral ore | Britannica

endangered species. …from the unregulated exploitation of coltan (the rare ore for tantalum used in consumer electronics products such as mobile phones and computers) in Kahuzi-Beiga National Park, one of the Democratic Republic of the Congo's premier forest parks. The park is also home to much of the population of the threatened….

In situ U–Pb isotopic dating of columbite–tantalite by LA–ICP–MS

Columbite–tantalite (Coltan) is the most important niobium (Nb)- and tantalum (Ta)-bearing economic mineral, commonly occurring in rare metal granite and pegmatite, alkaline granite, syenite and ...

In situ U–Pb isotopic dating of columbite–tantalite …

Columbite–tantalite (Coltan) is the most important niobium (Nb)- and tantalum (Ta)-bearing economic mineral, commonly occurring in rare metal granite and pegmatite, …

Columbotantalite (cbt/coltan) | SpringerLink

The generic term columbotantalite, cbt, comprises the different compositional varieties of columbite and tantalite, classically treated (e.g. Ramdohr 1980) as an isomorphic, continuous solid solution series between the members (Fe, Mn)Nb 2 O 6 (niobite, now columbite, cb) and (Fe, Mn)Ta 2 O 6 (tantalite, tan), a series also known …

What are conflict minerals?

"Conflict minerals," as defined by the US legislation, currently include the metals tantalum, tin, tungsten and gold, which are the extracts of the minerals cassiterite, columbite …

Niobium and tantalum | U.S. Geological Survey

Artisanal mining of columbite-tantalite (also called coltan) is practiced in many countries, particularly Burundi, the Democratic Republic of the Congo (Congo [Kinshasa]), Nigeria, Rwanda, and Uganda. Brazil has about 40 percent of the identified tantalum resources; other countries and regions with identified tantalum resources …

(PDF) Analytical fingerprint of columbite-tantalite (coltan

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. More ...

(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....

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

COLTAN is the name of two minerals mixture mainly, such as: columbite mineral (Fe, Mn)Nb2O6 and tantalite (Fe,Mn)Ta2O6. XRF-spectrometry has been recognized as the high credibility and usefulness ...

Geochronology of the Chakabeishan Li–(Be) rare

Here we present U–Pb dating results for columbite–tantalite (i.e., coltan) and 40 Ar/ 39 Ar dating results for muscovite and lepidolite from Li–(Be) rare-element pegmatite samples in the Chakabeishan area. These data allow us to define the age of the pegmatites and discuss their origin and tectonic setting, which will also guide further ...

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Finger of conflict minerals: columbite-tantalite ("coltan") ores

"Coltan" – an important tantalum source -is a central African trade name of mineral concentrates chiefly composed of members of the columbite-tantalite group [(Fe,Mn) (Nb,Ta) 2 O 6 ].

What is columbite used for?

What is columbite used to produce? The niobium-dominant mineral in coltan is columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is the tantalite. Tantalum from coltan is used to manufacture tantalum capacitors which are used for mobile phones, personal computers, automotive …