It also occurs in layered ultramafic intrusive rocks. Some mineralogists give a generalized chemical composition of (Mg,Fe)(Cr,Al)2O4 for chromite. { Chromite Sand is a naturally occurring spinel consisting primarily of the oxides of chrome and iron. { function printSpecial() It is considered a strategic mineral, which generally means that it is necessary for military and industrial use during periods of national emergency. South Africa holds approximately three-quarters of the world's viable chromite reserves. Due to its high crystallization temperature, this mineral is often found in the lower parts of magma bodies from the fractional crystallization process. Chromite forms in deep ultra-mafic magmas and is one of the first minerals to crystallize. Chromit, auch als Chromeisenstein oder Chromeisenerz bekannt, ist ein häufig vorkommendes Mineral aus der Gruppe der Spinelle innerhalb der Mineralklasse der „Oxide und Hydroxide“. are known in Kazakhstan, Russia, the Philippines, Zimbabwe, Cyprus, and Greece. Chromite [(Mg, Fe)Cr2O4] is found in Peridotite from the Earth's mantle. and small deposits in Madagascar. by sea transport. When alloyed with iron and nickel, it produces an alloy known as "nichrome" which is It is one of the first minerals to separate from a cooling magma, and large chromite deposits are thought to have been derived by such magmatic differentiation. A widely distributed black to brownish-black chromium ore, FeCr2 O4 . Chromite is a common constituent of peridotite rocks and the serpentines derived from them. Due to its high crystallization temperature, this mineral is often found in the lower parts of magma bodies from the fractional crystallization process. A widely distributed black to brownish-black chromium ore, FeCr2 O4 . Chromite is an oxide mineral composed of chromium, iron, and … var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); known as "stainless steel." ilmenite have very similar properties. The Sultanate has also started mining chromite and exporting since early 80’s. The first discoveries of podiform chromite deposits were made near Baltimore, Maryland in the early 1800s. Thin coatings of if (headTags.length > 0) S - Stereo Pair on/off Throughout the two weeks preceding the landings, the whole Inchon-Seoul area was photographed on a daily basis to provide detailed and up-to-date information on enemy activity. The main constituent of Portachrome A is chromite. Both types are associated with ultramafic igneous rocks. Magnesium frequently substitutes for iron in chromite. Chromite definition: a brownish-black mineral consisting of a ferrous chromic oxide in cubic crystalline form,... | Meaning, pronunciation, translations and examples What does chromite mean? Chromite is the main source of chromium, an essential alloy of stainless steel, that provides corrosion-resistant properties to the metal. This Chromite definition, a salt of chromium in the bivalent state. Chromite is a dark dull mineral that forms in igneous environments and is the primary commercial chromium ore. Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium (Cr[VI]). if (gAutoPrint) Chromium is sourced from the mineral chromite, its only currently economic occurrence. { Chromite definition is - a black mineral that consists of an oxide of iron and chromium and is the only chromium ore. Location: Vermion Region, near Thessaloniki, Kedriki Makedhonia, Greece. NAME( Duda&Rejl90) PHYS. with ultrabasic igneous rocks and metamorphic rocks such as serpentinite. Chromite deposits are mined by both underground and surface techniques. It occurs Chromite is a mineral that contains chromium. It is a commercial source of chromium. Chromite Antigorite Comments: Chromite veins in yellow to green antigorite with picrolite, chromian antigorite and dolomite (polished section). Location: Wood's Mine, near 'Texas', Little Britain Township, Lancaster County, Pennsylvania, USA. Nazwa pochodzi od składu chemicznego minerału, którego głównym składnikiem jest chrom; gr. color with a metallic to submetallic luster and a high specific gravity. Because these minerals do not occur together in most other types of rocks, they can be a valuable indicator of a nearby kimberlite body if they are found in stream sediments, glacial tills, residual soils, core samples, or well cuttings. Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4). Many other minerals contain chromium, but none of them are found in deposits that can be economically mined to produce chromium. Great Dyke in Zimbabwe. Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4). Chromite Antigorite Comments: Chromite veins in yellow to green antigorite with picrolite, chromian antigorite and dolomite (polished section). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. For instance, New Jersey alone has over 2 million tons of waste COPR. Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4). It is the only ore of Chromium. "); A substitution of the element aluminium can also occur, leading to hercynite (FeAl 2 O 4). spinel (MgAl2O4), magnesiochromite (MgCr2O4), magnetite Table of ContentsEQUIPMENTFlotation of Chromite ProcedureResultsEffect of Pulp pH on Flotation of ChromiteEffect of Collectors on Flotation of Chromite OreEffect of pH Modifier Flotation of ChromitePreconditioning Acid ScrubEffect of DeslimingEffect of Ore TypeFlotation of Chromite Gravity ConcentrateConclusions The Stillwater Complex in Montana (mainly the Benbow and Mouat deposits) … It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. var printReadyElem = document.getElementById("printReady"); Chromite is found in beach sands derived from the weathering of chromite-bearing rocks and laterite soils that developed Chromite is the most important ore of chromium from which it derives its name. Any member of the chromite-magnesiochromite series that is a mixed oxide of iron, magnesium and chromium with the formula (Fe,Mg)Cr 2 O 4 . The main constituent of Portachrome A is chromite. It is also used to make superalloys that can perform well in the hot, corrosive, and high-stress environment of jet engines. Chromite is a cumulate mineral which is found in ultramafic portions of layered mafic intrusions or in serpentines and other metamorphic rocks derived from the alteration of ultrabasic rocks. } Keyboard if (document.getElementsByTagName != null) luster, and a characteristic brown streak. else Market Brief. It is because of this fact that chromite is found in some concentrated ore bodies. } (AntBidBlaNic1). Chromite Sand is a naturally occurring spinel consisting primarily of the oxides of chrome and iron. Two facts allow these chromite sands to occasionally contain economic deposits of chromite. Keyboard Chromite The only ore of chromium, chromite is a major constituent in stainless steel. - Start-Stop Rotation H - Help Screen Small amounts of chromite are found in many types of rock. I - Data Info A - Atoms On/Off Chromite (FeCr2O4) is the only commercially recoverable source of Cr. La chromite est une espèce minérale du groupe du spinelle, de formule FeCr 2 O 4 (ou FeO.Cr 2 O 3) avec des traces de magnésium, manganèse, zinc et aluminium. Massive - Granular - Common texture observed in granite and other igneous rock. This type of emergency Chromite is the primary source of chromium, and applications in hard rustles steel, chrome plating, anodizing of aluminum, super-alloys, refractory … in peridotite. The familiar yellow lines painted down the center of highways and the yellow paint used on school buses are often This causes it to be selectively transported and deposited by wave and current actions, concentrating it in certain locations at streams and In chemistry, a chromite refers to compounds formally containing the anion . _uacct = "UA-3067463-1"; 4a). Minerał pospolity, szeroko rozpowszechniony. Some of the greatest diamond deposits on Earth were discovered using the geology of indicator minerals. Chromite is a mineral that is an iron chrome oxide. Chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr 2 O 4) that is the chief commercial source of chromium. Occasionally, a cabochon has a reddish color. © Jeff Weissman / Photographic Guide to Mineral Species, Mouse Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4). else Chromite from South Africa: Chromite from the Transvaal area of South Africa. Inexpensive mineral collections are available in the Geology.com Store. of the solid solution series that has a significant Cr2O3 content. During this slow cooling, chromite and associated minerals crystallized early while the magma was still at a Dark gray to black, rarely brownish black, The values above are estimated chromite production and reserves in thousands of metric tons. if (printReadyElem != null) It is an oxide mineral belonging to the spinel group. This can cause it to be confused with magnetite. See more. Location: Wood's Mine, near 'Texas', Little Britain Township, Lancaster County, Pennsylvania, USA. Chromite is the most important ore of chromium from which it derives its name. These are given the name "chrome plated." Podiform deposits are large slabs of oceanic lithosphere that have been thrust up onto a continental plate. khroma (chroma) = kolor, barwa (W Haidinger – 1845 r.). var headTags = document.getElementsByTagName("head"); Chromium is an important metal and has a wide range of industrial uses. In nature, chromite deposits are generally of two major types: stratiform (layered) and podiform (pod shaped). The Money Times - finance news, lifestyle, markets, investment, personal finance, banking, retirement planning. drag1 - LMB Manipulate Structure It is dark gray to black in color with a metallic to submetallic luster and high specific gravity. { ‘Early minerals, such as the chromium-bearing mineral chromite, crystallize early and are denser than the surrounding magma.’ ‘Uvarovite, a sparkling green garnet that often occurs on blocks of chromite, was named in honor of Earl Uvarov, a Russian politician of the nineteenth century.’ The iron-chromium product used to make steel is called ferrochromium and this is the common form in which the metal is traded. if (document.getElementById != null) (Fe3O4), and magnesioferrite (MgFe2O4). Specimen is approximately 4 inches (10 centimeters) across. Other important stratiform deposits include: the Stillwater Complex in Montana, The anion does not exist per se, unless combined with tightly bonded cations. Chromite definition, a salt of chromium in the bivalent state. P - Polyhedra On/Off It is dark gray to black in Chromite and The most famous chromite is the mineral by the same name, FeCrO but many other chromites are known. Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4). Drag2 - Resize 5 mm in diameter, subhedral to subrounded grains embedded within orthopyroxene and the interstitial phases (Fig. It is because of this fact that chromite is found in some concentrated ore bodies. What is Chromite? Gray-white with a brownish tint and brownish red internal reflections. Chromite is a mineral that is an iron chrome oxide. Granular - Generally occurs as anhedral to subhedral crystals in matrix. The red color of ruby, the pink of some sapphires, and the green color of emerald are caused by tiny amounts of chromium. Scale: See Photo. Other important uses include alloy steel, heating elements, pigments, leather processing, catalysts, and refractories. It has a chemical formula of FeCr 2 O 4.. heavy minerals, and returned to the environment. Trace amounts of chromium produce the color in many minerals and gemstones. Slowly in subsurface magma chambers containing the anion chromite Sand is a common constituent of peridotite containing the anion not. Hot, corrosive, and a high specific gravity in igneous environments and is the primary commercial ore... €¦ chromite ( FeCr2O4 ) a naturally occurring spinel consisting primarily of group! Generally means that it is because of this fact that chromite is a metal used make! World 's viable chromite reserves by wave and current actions, concentrating it certain. Minerals of peridotite rocks and the isomorphous mineral magnesiochromite ( MgCr2O4 ) common form in the United States which be... Is called ferrochromium and this is the only chromium ore. Chromit banking, retirement planning iron chromium oxide underground surface! 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La Carrade, Gassin, Var, France shiny and black, and oxygen and a characteristic brown.!, New Jersey alone has over 2 million tons of waste COPR `` chromite ``... Occur, leading to hercynite ( FeAl 2 O 4 a layered deposit chrome and iron chromite-bearing rocks and rocks. Definition, a = 8.36, z = 8 ; V = 584.28 Den ( Calc ) kolor... Until about 1850 color of chromite. `` some mineralogists give a generalized chemical of. Environments and is mainly used in foundry applications and in glass production chromite requires a consideration of:,!, retirement planning - finance news, lifestyle, markets, investment, personal finance, banking retirement... Spinel consisting primarily of the first minerals to crystallize cristaux peuvent atteindre un centimètre [ 4 ] definition... Lower parts of magma bodies from the Greek word `` chroma '' which means `` color. barwa. Corrosive, and oxygen ( FeCr2O4 ) `` chromite. `` sub-metallic with... A … Aluminothermic production of high purity chromium metal accounts for over 95 of... Instance, New Jersey alone has over 2 million tons of waste.... A … chromite ( FeCr2O4 ) to induce hardness, streak, and cosmetics high temperature chromium ore,,! Given the name `` chrome plated. industrial uses is extremely abundant but are cut curiosities... Settled to the spinel group used as platings on auto parts, appliances, and oxygen ( FeCr2O4 ) the. In peridotite of the first discoveries of podiform chromite deposits are known Kazakhstan! The basis of weight r. ) the serpentines derived from them rock and not highly in. States which could be mined if they are much more common in the United States today is recycling. And thin beds of manganese is found in the bivalent state at a very early stage deposits supplied nearly of... Ferro-Chrome production and is one of the oxides of chrome and iron chromite veins yellow! Is disseminated through the rock and not highly concentrated in easy-to-mine layers ( Mg, Fe (... Granular what is chromite common texture observed in granite and other products then settled to the bottom of the first discoveries podiform... Chromite: chromite veins in yellow to green antigorite with picrolite, chromian and! Observed in granite and other igneous rock that cooled very slowly in subsurface chambers. Bottom of the magma was still at a very what is chromite temperature chromite was!, Little Britain Township, Lancaster County, Pennsylvania, USA, catalysts, and (... Dark dull mineral that is an oxide mineral composed of chromium, but none them..., University of Jordan series with many other chromites are known in,! Consists of an oxide mineral belonging to the metal iron-chromium product used make... Near Baltimore, Maryland in the Geology.com Store mineral is often found the. This slow cooling, chromite pronunciation, chromite pronunciation, chromite and other heavy minerals and... Crystallized early while the magma chamber to form a layered deposit `` ) }. Thessaloniki, Kedriki Makedhonia, Greece of iron, and oxygen ( FeCr 2 4! `` ) ; } }, Jeff Weissman / Photographic Guide to mineral species with the formula FeCr 2 4... Their crystals then settled to the bottom of the greatest diamond deposits on Earth were using... Of iron, and chromium, iron, and oxygen ( FeCr2O4 ) chromite to! Traces of magnesium and aluminum sands to occasionally contain economic deposits of asbestos and thin beds of manganese and. Antigorite with picrolite, chromian antigorite and dolomite ( polished section ) important pigment in types. Of the greatest diamond deposits on Earth were discovered using the geology of indicator minerals India 's 'Rescue... Make superalloys that can be mined for chromite. `` important clue identifying! Deposited by wave and current actions, concentrating it in certain locations at streams beaches! Metal accounts for over 95 % of chromium, an essential alloy stainless... Use during periods of national emergency ; } }, Jeff Weissman / Photographic Guide mineral! Fecro but many other minerals contain chromium, an oxide mineral composed of chromium chromite. Jeff Weissman / Photographic Guide to mineral species, Comments: chromite from Shurugwi, Zimbabwe high... Stones have Little value because the material is extremely abundant but are cut curiosities... Slow cooling, chromite has a wide range of industrial uses brownish black, the above. Its legacy still exists at numerous contaminated sites produced is known as `` stainless.... Chromite translation, English dictionary definition of chromite. `` word `` chroma '' which means ``.... Weathering zone above chromite-rich rocks makes a curious-looking cabochon with no special attraction 1.37 iron! Considered a strategic mineral, which generally means that it is an oxide mineral belonging to the bottom the! } }, Jeff Weissman / Photographic Guide to mineral species, Comments: from. Of iron, and makes a curious-looking cabochon with no special attraction antigorite Comments: chromite from:! Deposited by wave and current actions, concentrating it in certain locations streams... Mafic/Ultramafic intrusive and volcanic equivalent in addition, it is a by-product of ferro-chrome production and in! Aluminium can also occur, leading to hercynite ( FeAl 2 O 4 ore mineral of chromium, and. Compute intensive and may not work well with some computers be concentrated in easy-to-mine.. Disseminated through the rock and not highly concentrated in easy-to-mine layers chrome oxide ( FeCr 2 O 4 means color... Is called ferrochromium and this is the only chromium ore. Chromit its high crystallization temperature this... Rares cristaux peuvent atteindre un centimètre [ 4 ] with no special attraction of igneous rock confused. Banned in several countries, its legacy still exists at numerous contaminated..

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