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TANTALITE (Iron Manganese Tantalum Niobium Oxide)

Tantalite is the more tantalum rich end member and columbite is the more niobium rich end member. Niobium had been called columbium hence the name columbite. Tantalite's greatest difference from columbite is its much greater specific gravity, 8.0+ compared to columbite's 5.2. Other properties that vary slightly are color, transparency and streak.

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Extractive metallurgy of columbite-tantalite ore: A detailed review

Columbite-tantalite is a solid solution whose chemical composition varies by the substitution and coexistence of niobium, tantalum, manganese, and iron, in ore structures between pure columbite ...

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What is Coltan? 5 Facts to Know About the Conflict Mineral

Short for columbite-tantalite, coltan ore itself hosts columbite, also known as niobite, and tantalite, which contain the technology elements niobium and tantalum …

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What is Coltan? 5 Facts to Know About the Conflict Mineral

Short for columbite-tantalite, coltan ore itself hosts columbite, also known as niobite, and tantalite, which contain the technology elements niobium and tantalum respectively.

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Columbite supergroup of minerals: nomenclature and classification

Columbite-group minerals with 1-3 wt.% Sc2O3 are referred to as scandian columbite - tantalite and show degrees of structural order similar to columbite - tantalite lacking Sc. Disordered ...

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Columbite Mineral Resources Information And Its Deposits In …

Columbite which has been widely spread across the globe as a niobium mineral is a superconductive metal used in alloys to improve their strength. Coltan, which is the short form for columbite–tantalites, industrially known as tantalite is used in producing tantalite capacitors.

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What are the uses of Tantalite?

tantalite is an ore of tantalum and niobium and as mineral specimens. a popular ore would be columbite tantalite and the uses of that is the same as tantalum. This answer is: 👍 Helpful ( 0 ...

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COLUMBITE-TANTALITE, RUTILE AND OTHER …

Topaz, columbite-tantalite, Nb-Ta rutile, cassiterite and apatite are the major phases. Zircon, monazite, Fe oxide, Mn-ilmenite, pyrite, arsenopyrite and sphalerite also occur, but wolframite is absent and uranium-bearing phases are only found very rarely as inclusions in other minerals. The columbite-tantalite shows considerable variation

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Columbite Mineral Resources Information And Its …

Coltan, which is the short form for columbite–tantalites, industrially known as tantalite is used in producing tantalite capacitors. These capacitors are further used in several electronics of all kinds, including mobile phones.

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Columbite-(Fe): Mineral information, data and localities.

Columbite-(Fe) Wenger M, Armbruster T, Geiger C A (1991) Cation distribution in partially ordered columbite from the Kings Mountain pegmatite, North Carolina American Mineralogist 76 1897-1904: 1991: 0: 100: 0001436: Columbite-(Fe)

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Tantalite: The mineral columbite-tantalite information and pictures

Tantalite is the tantalum-rich member, and Columbite is the niobium-rich member. Tantalite is named after its tantalum content, and, together with Columbite, are the most important …

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Coltan | Earth Sciences Museum

Coltan is short for columbite-tantalite, a dull metallic ore. When refined, coltan becomes a heat resistant powder, metallic tantalum, which has unique …

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A mixed collector system for columbite-tantalite flotation

A typical flowsheet used for gravity pre-concentration recovers approximately 45%–65% columbite-tantalite, but significant Ta/Nb losses in gravity tailings occur in the fine fractions and overflow slimes (Bulatovic, 2010). The froth flotation of columbite-tantalite using specific collectors has received increased attention for the recovery of ...

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Ultrastructure of a Columbite‐Tantalite Mineral from the …

TEM (FEI Tecnai G2 F20) equipped with an EDS detector was used to acquire structural/chemical information about the columbite-tantalite. The maximum accelerating voltage was found to be 200 kV. The TEM foil was extracted for attachment to Cu grids via Pt welding and then trimmed to 50–70 nm thicknesses.

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U-Pb columbite-tantalite chronology of rare-element

Columbite-tantalite minerals are potentially useful for dating the emplacement age of economically important rare-element pegmatites. Romer and Wright have shown that columbite-tantalite may accommodate considerable amounts of uranium (circa 500–1000 ppm) and exclude lead almost completely.The U-Pb systematics, however, are typically not …

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U-Pb isotopic dating of columbite-tantalite minerals: Development of

Tests of in situ U-Pb dating demonstrate that SIMS can easily be used to date columbite-tantalite minerals with errors and precisions overlapping the reference ID-TIMS age. There are, however, significant matrix effects for non-matching Nb-Ta-Fe-Mn compositions of sample and reference material. Matrix effects are highly correlated with the Ta ...

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Columbite-tantalite (COLTAN)

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.

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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 carbonatite. Its high U but low common Pb contents make it an ideal mineral for U–Pb isotopic dating of Nb–Ta mineralization. In order to ...

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(PDF) Columbite-tantalite and cassiterite as indicator minerals for

The chemical and textural features of columbite-tantalite and cassiterite in the Leinster albite-spodumene pegmatites are seen in similar rare element pegmatites and rare metal granites elsewhere ...

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Columbite–Tantalite of the Kester Deposit (Eastern Yakutia)

Columbite–tantalite forms polymineral individuals with concentric growth zonality (from the core to the rim): columbite-(Fe) → columbite-(Mn) → tantalite-(Mn) + uranmicrolite → columbite-(Mn). In columbite of the Kester Deposit, WO3 is a typomorphic impurity, which is 2.67%, on average (formula coefficent, apfu is 0.04); the maximum ...

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1 Key facts and figures about coltan and tantalum

concentrates are tantalite and niobite (also known as columbite). These mineral concentrates are chemically similar but contain respectively more tantalum or niobium. Coltan is an abbreviation for columbite-tantalite that is only used in parts of Africa or as a nickname for this specific mineral. Other minerals in

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Geochronology and geochemistry of zircon and columbite–tantalite …

The columbite–tantalite group minerals (CGMs, [Fe, Mn] [Nb, Ta] 2 O 6) and zircon are common accessory minerals in granitic systems and are important hosts to many critical metals.Textural variations of CGMs and zircons in rare metal granites and granitic pegmatites reflect changes in their crystallization environment during the magmatic and hydrothermal …

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2018 Minerals Yearbook

Globally, tantalite and columbite-tantalite (also referred to as "coltan") were the leading minerals mined for tantalum. The primary marketable tantalum materials were tantalum metal (unwrought and wrought alloys, metal, and powder), ore, and scrap. Tantalum resources in …

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Columbite-Tantalite

5.5 x 2.1 x 0.9 cm. Columbite-Tantalite is a combination term that is used generically for the specimens in the columbite/tantalite families. Under normal circumstances, they are very difficult to tell apart.

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Coltan (Columbite-Tantalite): Mineral information, data and …

Coltan (Columbite-Tantalite) mineral data, information about Coltan (Columbite-Tantalite), its properties and worldwide locations.

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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-tantalite and wolframite, respectively. Downstream companies often refer to the extracts

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What is columbite tantalite used for? – Quick-Advice

What is columbite tantalite used for? 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 …

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Columbite: The mineral columbite-tantalite information and pictures

Columbite is the niobium-rich member, and Tantalite is the tantalum-rich member. Columbite is named after its niobium content, which was previous known as columbium prior to its …

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Cassiterite features and lifespan of Limu granite Ta-Nb-Sn-W ore

Columbite-tantalite crystals occur within quartz and albite, or are semi-enclosed by quartz and lepidolite in the late-stage mineralized granite without alteration (Fig. 2 D, E) and no veinlet mineralization has been observed, precluding post magmatic hydrothermal processes.

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Composition, fractionation trend and zoning accretion of the columbite

Columbite-tantalite ore mineralogy from the Kenticha rare-metal granites and pegmatites, Adola (Southern Ethiopia), has been studied in detail and the results can be used as an indicator of the metallogenic evolution. On the basis of the chemical data, the compositional fields of the columbite-tantalite collected from alaskitic granite, aplite ...

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