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Chromite

Chromite is a crystalline mineral composed primarily of iron(II) oxide and chromium(III) oxide compounds. It can be represented by the chemical formula of FeCr2O4. It is an oxide mineral belonging to the spinel group. The element magnesium can substitute for iron in variable amounts as it forms a solid solution with magnesiochromite (MgCr2O4).…

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Properties

Igneous intrusionsMetamorphicIron meteoritesSilicatesTroilite
25 related topics

Distribution of deposits

OrthocumulatePeridotiteMantleLayeredUltramafic
46 related topics

Health and environmental impacts

TrivalentLipidGlucoseHexavalentCrocoite
38 related topics

Applications

RefractoryHeat stabilityChrome platingSuperalloysNichrome
12 related topics

Key facts & relationships

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Category
Oxide minerals Spinel group Spinel structural group
Cleavage
None, parting may develop along {III}
Color
Black to brownish black; brown to brownish black on thin edges in transmitted light
Crystal class
Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m)
Crystal habit
Octahedral rare; massive to granular
Crystal system
Isometric

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Overview

Properties

Distribution of deposits

Health and environmental impacts

Applications

Gallery

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Map overview Semantic statistics

Chromite

Nodes153
Edges152
Triples151
Avg. degree1.99
Density0.013072
Components1

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Chromite

Top relations

related to Distribution of deposits · 18
Chromite → Albania, Bushveld Igneous Complex, Canada, Earth's, Finland, In, It, Kazakhstan, Madagascar, Montana, Ore, South Africa, Stratiform, The, The Stillwater Igneous Complex, There, Turkey, Zimbabwe
related to Crystal structure · 12
Chromite → Al, Chenmingite, Fe, Fe2, Fe3, FeCr2O4, II, Mg, MgCr2O4, The, These, Ti
related to Stratiform deposits · 9
Chromite → Bird River, Bushveld Igneous Complex, Examples, Great Dyke, Precambrian, Stillwater Igneous Complex, Stratiform, The, This
has impact · 7
Chromite → Chromium, Cr, Environmental, Health, III, In, VI
related to Gallery · 7
Chromite → Baltimore, Eastern Province, Hangha, Kenema District, MarylandLarge, PPL, Sierra Leone
related to Reactions · 7
Chromite → CO, CO2, It, Other, The, There, This
related to Crystal size and morphology · 6
Chromite → Grains, However, III, The, These, Twinning
has application · 5
Chromite → Chromium, It, Most, Superalloys, The
related to Porcelain tile pigmentation · 5
Chromite → Cr, Fe, Natural, Porcelain, The
is a · 2
Chromite → crystalline mineral composed primarily of iron, part of the spinel group

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Important terminology

chromium seen deposits ferrochrome also minerals igneous found podiform iron ore form production grains mineral stratiform large intrusions layered ultramafic

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
ChromiteCategoryOxide minerals Spinel group Spinel structural group1.00infobox
ChromiteCleavageNone, parting may develop along {III}1.00infobox
ChromiteColorBlack to brownish black; brown to brownish black on thin edges in transmitted light1.00infobox
ChromiteCrystal classHexoctahedral (m3m) H-M symbol: (4/m 3 2/m)1.00infobox
ChromiteCrystal habitOctahedral rare; massive to granular1.00infobox
ChromiteCrystal systemIsometric1.00infobox
ChromiteDiaphaneityTranslucent to opaque1.00infobox
ChromiteFormula(Fe, Mg)Cr2O41.00infobox
ChromiteFractureUneven1.00infobox
ChromiteIMA symbolChr1.00infobox
ChromiteLusterResinous, Greasy, Metallic, Sub-Metallic, Dull1.00infobox
ChromiteMohs scale hardness5.51.00infobox
ChromiteOptical propertiesIsotropic1.00infobox
ChromiteOther characteristicsWeakly magnetic1.00infobox
ChromiteRefractive indexn = 2.08–2.161.00infobox
ChromiteSpace groupFd3m (no. 227)1.00infobox
ChromiteSpecific gravity4.5–4.81.00infobox
ChromiteStreakBrown1.00infobox
ChromiteStrunz classification4.BB.051.00infobox
ChromiteTenacityBrittle1.00infobox
ChromiteTwinningSpinel law on {Ill}1.00infobox
ChromiteUnit cella = 8.344 Å; Z = 81.00infobox
Chromiteis acrystalline mineral composed primarily of iron0.90text
Chromiteis apart of the spinel group0.90text

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