1. Columbite synonyms, Columbite pronunciation, Columbite translation, English dictionary definition of Columbite

2. Columbite-tantalite synonyms, Columbite-tantalite pronunciation, Columbite-tantalite translation, English dictionary definition of Columbite-tantalite

3. Columbite Ore minerals or Columbite concentrate export is the export of Columbite from Nigeria to international buyers located in various parts of the world

4. Tantalite forms a solid solution series with Columbite known as the Columbite-Tantalite series

5. Columbite forms a solid solution series with Tantalite known as the Columbite-Tantalite series

6. What are synonyms for Columbite?

7. Columbite-(Fe) Comments: Dark grains of Columbite-(Fe) wtth small brown grains of fluorcarbonates of LREE

8. Synonyms for Columbite in Free Thesaurus

9. 1 synonym for Columbite: niobite

10. Definition of Columbite in the Definitions.net dictionary

11. What does Columbite mean? Information and translations of Columbite in the most comprehensive dictionary definitions resource on the web.

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13. Columbite crystallizes in the rhombic system

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15. Buy Columbite Columbite - a group of minerals with a black, brown-black color, usually containing elements of iron, manganese or magnesium

16. Extreme variation and apparent reversal of Nb-Ta fractionation in Columbite-group minerals from the Scheibengraben beryl-Columbite granitic pegmatite, Marsikov, Czech Republic

17. Species: Columbite-TANTALITE Locality: Yuhas Mine, Acworth, NH Specimen Size: 6.5 cm specimen of massive Columbite-Tantalite with minor feldspar

18. Columbite-(Fe): Fe 2+ Nb 2 O 6 Columbite-(Mn): (Mn 2+,Fe 2+)(Nb,Ta) 2 O 6 While Columbite-(Mn) is generally not a radioactive mineral, the radioactivity present in these specimens is probably due to minor amounts of U or UO 2

19. Columbite crystals are short prismatic, thin tabular, or tabular.

20. Columbite-(Fe) - Dull black somewhat crude set of crystals

21. Coltan is short for columbite-tantalite, a dull metallic ore

22. Columbite, Tantalite, Tin, Gold, Copper Trading company in Greenville, DE.

23. The Ta enrichment in the Columbite is attributed to replacement of the Columbite by Ta- and F-rich hydrosilicate melt in the magmatic-hydrothermal transitional stage.

24. It is exported in either the Columbite Ore form or the Columbite concentrate form, and are further processed upon arrival at the buyer’s facility into various forms of alloys or for

25. Favorite Add to Large Columbite (Fe) Crystal From Brazil - 1.2" - …

26. Product/Service:Selling Columbite, tantalite, casseterite ores along with precious minerals such as topaz

27. ,,Selling Columbite, tantalite, casseterite ores along with precious minerals such as topaz

28. Coltan is a mixture of columbite and tantalite, both valuable Tantalum ores

29. Columbite definition is - a black mineral consisting mostly of iron and niobium.

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31. Tantalite is the tantalum-rich member, and Columbite is the niobium-rich member

32. Columbite is the niobium-rich member, and Tantalite is the tantalum-rich member

33. Columbite (niobite, tantalite) A mineral oxide (Fe,Mn)(Ta,Nb) 2 O 6; when Ta > Nb the mineral is called tantalite, but when Ta < Nb it is called Columbite; sp

34. 17 Grams Very Beautiful Combination of Columbite Apatite and Muscovite Crystal From Skardu Pakistan ssminerals

35. Coltan is a dull black metallic ore consisting of two minerals, columbite and tantalite

36. The Columbite in the Zhaojinggou deposit crystallized from a highly evolved peraluminous granitic magma

37. ‘Beryl, Columbite, and triphylite are common accessory minerals in the Estes pegmatite, especially in the coarse-grained layers.’ ‘It is most abundant in the coarse-grained facies and is often associated with triphylite, Columbite, and sphalerite.’

38. ‘Beryl, Columbite, and triphylite are common accessory minerals in the Estes pegmatite, especially in the coarse-grained layers.’ ‘It is most abundant in the coarse-grained facies and is often associated with triphylite, Columbite, and sphalerite.’

39. Coltan is short for Columbite-tantalite - a black tar-like mineral found in major quantities in the Congo.

40. • Columbite is a mineral of a black colour, sub-metallic lustre • A mineral of a black color, submetallic luster, and high specific specific gravity • Hard, black (often iridescent), heavy oxide mineral of iron, manganese • Columbite, also called niobite, niobite-tantalite and columbate ((Fe

41. Columbite, hard, black (often iridescent), heavy oxide mineral of iron, manganese, and niobium, (Fe, Mn)Nb2O6

42. Coltan, also known as columbite-tantalite, is a dull black metallic mineral containing the elements niobium and tantalum

43. Columbite is named after its niobium content, which was previous known as columbium prior to its renaming.

44. Browse 31 Columbite stock photos and images available, or start a new search to explore more stock photos and images

45. Columbite-tantalite — Coltan for short — is a dull metallic ore found in major quantities in the eastern areas of Congo

46. TUC14-26 Columbite $2,500.00 Toenail, 2.8 x 2.7 x 1.0 cm Himalaya Mine, San Diego County, California, USA

47. A dull black aggregate of the minerals Columbite and tantalite, mined as a source of niobium and tantalum

48. COLTAN (Columbite-Tantalite) is a dull metallic ore found in major quantities in the eastern areas of Congo

49. Columbite is the most widespread niobium mineral and makes for an important ore of the industrially useful metal

50. Columbite-tantalite is also found as crystals up to 2 cm long in a pegmatite in the NE SW SE Sec

51. The maximum Columbite solubility was ~ 10 − 2 m Ta and Nb in 1 m HF solutions at 300 °C

52. These motor-operated Columbite price machines are available in various distinct models and their capacities may vary for each.

53. Columbite-tantalite, Coltan for short, is a grey metallic ore found in large quantities in the eastern areas of Congo

54. The niobium-dominant mineral in coltan is Columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is the tantalite.

55. Columbite definition: a black mineral consisting of a niobium oxide of iron and manganese in orthorhombic Meaning, pronunciation, translations and examples

56. Columbite, also called niobite, niobite-tantalite and columbate [(Fe,Mn)Nb 2O 6], is a black mineral group that is an ore of niobium

57. Hypernyms ("Columbite" is a kind of): mineral (solid homogeneous inorganic substances occurring in nature having a definite chemical composition)

58. Tantalite is named after its tantalum content, and, together with Columbite, are the most important minerals containing the rare element tantalum.

59. (Download (PDF) Coltan fact sheet) Coltan is short for Columbite-tantalite – a black tar-like mineral found in major quantities in the Congo

60. Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)Nb 2 O 6], is a black mineral group that is an ore of niobium

61. The eastern part of the Democratic Republic of Congo (DRC) is extremely rich in Coltan (Columbite-Tantalite), a rare metallic ore used for the production …

62. Columbite is found mostly in the northern part of Nigeria and the states with this deposits include; Plateau, Kogi, Kano, Nasarawa, Kaduna and Bauchi states.

63. What does Columbite mean? A black, red-brown, or colorless mineral, essentially (Fe, Mn)(Nb, Ta)2 O6 , the principal ore of niobium

64. Chloride, carbonate, and bicarbonate had negligible effect on Columbite solubility, but the stoichiometry of the complexes was not determined and hence no thermodynamic parameters were derived.

65. 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

66. What Is Coltan ?Coltan, short for Columbite-tantalite is a metallic ore comprisingNiobium and Tantalum, found mainly in the eastern regions of theDemocratic Republic of Congo (formally Zaire)

67. A well-developed crystal of Columbite-(Fe) displaying a tabular-blocky habit with crystals in parallel position associated with creamy white bladed crystals of probable Albite

68. Catalog No.: 1746 Notes: Composition of this "Columbite-Tantalite" specimen has not been determined.File card that came with specimen indicated it was purchased 8 …

69. Meronyms (substance of "Columbite"): atomic number 41; Nb; niobium (a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium)

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71. KRC-07 Columbite-Tantalite $900.00 Small Cabinet, 5.5 x 2.1 x 0.9 cm Devil's Hole Quarry, Texas Creek Area, Fremont Co., Colorado, USA (3 more images) Order Now

72. The major geological units are Precambrian metasediments partly mixed with younger (Cambrian) granites and associated pegmatites; cassiterite, columbite, tantalite, and gold are mined from alluvial deposits on a small scale.

73. Columbite-(Mn) Plumbopyrochlore Comments: Yellow-brown plumbopyrochlore crystalline crust over black manganoColumbite grain.Such plumbopyrochlore-manganoColumbite ovoids with different grade of replacement are very typical for the locality

74. Columbite ((Fe, Mn, Mg)(Nb, Ta) 2 O 6: Iron Manganese Magnesium Niobium Tantalum Oxide) is the most abundant niobium mineral and is used in alloys for improved strength.

75. Columbite definition, a black, crystalline mineral, iron niobate, (Fe, Mn)Nb2O6, the principal ore of niobium, an end member of a series of solid solutions in which manganese and tantalum combine to form tantalite

76. Definition of Coltan : a dull black ore that consists of a mixture of columbite and tantalite and is a minor source of tantalum Examples of Coltan in a Sentence Recent Examples on the Web Some mines are …

77. Nb-oxides, such as fergusonite, samarskite, columbite and a pyrochlore-like mineral, are Ta- and Mn-poor, which corresponds to those of less-fractionated rocks of anorogenic alkali granite and pegmatitic granite in the continental situation.

78. Columbite was the second species named from the USA, after celestine (q.v.) Type Locality: ⓘ Green's Well pegmatite (Green's Tank), Pilgangoora (Pilgangoora Mining Centre; Lynas Find; McPhees Patch; Mount York), Wallareenya Station, Port Hedland Shire, Western Australia, Australia

79. Columbite is one of the natural solid minerals which is deposited in Nigeria, West Africa in a large quantity, and prior to the discovery of crude oil in the country, Nigeria has been a major exporter of this mineral resources.

80. Abstract Columbite crystals from niobium-yttrium-fluorine (NYF) pegmatites lacking zircon or containing metamict cyrtolite were analyzed for major and minor elements (Electron Microprobe (EMP)), trace elements (Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS)), and U-Pb geochronology (Laser AblationMulti-Collector-Inductively Coupled Plasma-Mass Spectrometry (LA …