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Columbite

Columbite, also called niobite, niobite-tantalite and columbate, with a general chemical formula of (FeII,MnII)Nb2O6, 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. Niobite has many applications in aerospace, construction and the medical industry. Dating columbite…

History & Applications

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Category
Oxide minerals
Cleavage
Distinct
Color
Black, brownish black.
Crystal class
Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Crystal habit
Massive – granular – common texture observed in granite and other igneous rock; Striated - parallel lines on crystal surface or cleavage face.
Crystal system
Orthorhombic

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Overview

History and etymology

Columbite species

Structure

Applications

Formation

Environmental impact

Dating

Artisanal and small-scale mining

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Map overview Semantic statistics

Columbite

Nodes67
Edges66
Triples156
Avg. degree1.97
Density0.029851
Components1

How this topic connects Entity context

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Columbite

Top relations

related to Further reading · 39
Columbite → Abdulmumin, Audu, Bulletin, COLTAN, Columbite-Group Minerals, Columbite-Tantalite Mineral, Direct Evidence, Edege-Mbeki, Effects, Elaoyi, Ephraim, Formation Mechanism, Gao, Geofluids, Isah, ISSN, Lei, Liu, Lock-gray-alt-2, Lock-green
related to history · 20
Columbite → Amidst, April, Charles Hatchett, Christopher Columbus, Connecticut, Connecticut Colony, Fellow, Governor, Governor's, Haddam, Hans Sloane, In, John Winthrop, London, President, Royal Society, The, This, United States, Winthrop's
related to Artisanal and small-scale mining · 15
Columbite → Africa, Artisanal, Asia, Central American, Coltan, Congo, Democratic Republic, Due, In, Liberia, Oceania, Sierra Leone, South America, This, While
related to Dating · 11
Columbite → ID-TIMS, LA-ICP-MS, SIMS, The LA-ICP-MS, The SIMS, The U-Pb, There, These, This, U-Pb, U/Pb
related to Formation · 7
Columbite → Another, Currently, In, It, One, The, This
has application · 6
Columbite → HSLA, In, MRI, NMR, Super, When
related to Columbite species · 6
Columbite → Fe, Manganocolumbite, Mn, Nb, Ta, The
related to External links · 6
Columbite → Collier's New Encyclopedia, Encyclopædia Britannica, New International Encyclopedia, Texts, Wikisource, Wiktionary-logo-en-v2
has impact · 5
Columbite → Each, In, Radioactive, To, When
related to Structure · 5
Columbite → Different, In, Overall, Since, When

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Important terminology

mineral minerals due tantalum radioactive often coltan crystal formation niobium mining species niobite uranium orthorhombic structure group artisanal applications found

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
ColumbiteCategoryOxide minerals1.00infobox
ColumbiteCleavageDistinct1.00infobox
ColumbiteColorBlack, brownish black.1.00infobox
ColumbiteCrystal classDipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)1.00infobox
ColumbiteCrystal habitMassive – granular – common texture observed in granite and other igneous rock; Striated - parallel lines on crystal surface or cleavage face.1.00infobox
ColumbiteCrystal systemOrthorhombic1.00infobox
ColumbiteFormula.mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:l…1.00infobox
ColumbiteFractureSub-conchoidal: fractures developed in brittle materials characterized by semi-curving surfaces.1.00infobox
ColumbiteIMA symbolClb1.00infobox
ColumbiteLusterSub-metallic1.00infobox
ColumbiteMohs scale hardness61.00infobox
ColumbiteOptical propertiesBiaxial (+), b = 2.29–2.41.00infobox
ColumbiteOther characteristicsRadioactive, non-fluorescent.1.00infobox
ColumbiteSpace groupPbcn1.00infobox
ColumbiteSpecific gravity5.3–7.31.00infobox
ColumbiteStreakBlackish brown1.00infobox
ColumbiteStrunz classification4.DB.351.00infobox
Columbiteis apolymorph of tapiolite0.90text

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