chromite


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chromite

(krō`mīt), dark brown to black mineral. It is an iron-chromium oxide, FeCr2O4, with traces of magnesium and aluminum. Its crystals are octahedral, but rare; it usually occurs as irregular, granular masses in association with igneous rocks, including ophiolites, which are segments of oceanic crust exposed on land by tectonic processes usually associated with plate convergence (see plate tectonicsplate tectonics,
theory that unifies many of the features and characteristics of continental drift and seafloor spreading into a coherent model and has revolutionized geologists' understanding of continents, ocean basins, mountains, and earth history.
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). Chromitite is an igneous rock composed chiefly of the mineral chromite. The only commercial source of chromium and its compounds, chromite is used in the manufacture of refractory materials. Principal countries producing chromite are South Africa, India, Kazakhstan, and Zimbabwe.

chromite

[′krō‚mīt]
(mineralogy)
FeCr2O4 A mineral of the spinel group; crystals and pure form are rare, and it usually is massive; the only important ore mineral of chromium. Also known as chrome iron ore.

chromite

1. a brownish-black mineral consisting of a ferrous chromic oxide in cubic crystalline form, occurring principally in basic igneous rocks: the only commercial source of chromium and its compounds. Formula: FeCr2O4
2. a salt of chromous acid
References in periodicals archive ?
Basic refractory bricks industry is also the major consumer of chromite. It is used in the production of refractories for its high melting point and high resistance against acids and bases.
Noront is the leading player in the mineral belt of the James Bay lowlands with three mine-able base metal deposits, four chromite deposits, and a number of promising exploration plays, mostly acquired from Cliffs Natural Resources in 2015.
Researchers studied layers of chromite in South Africa's Bushveld Complex, where over 80% of the global resources of platinum-bearing chromite deposits can be found.
Copper, on the other hand, shared 17 percent, or P14.01 billion, while the remaining 1 percent, or P0.77 billion, came from the collective values of silver and chromite.
'The allegations reported in the news for the illegal mining of Chromite in Tehsil Tangi District Charsadda is not based on facts'.
Hasan Reza Yusufi, yet another member of the provincial council, says chromite has for months been extracted by Pakistani engineers and smuggled to Pakistan.
Keywords: Sodium chromate, Low grade chromite ore, Muslimbagh area
Although chromite costs about double the high cost of silica, the ability to magnetically separate chromite from silica and the high reclamation rate associated with furan binder made this system the low-cost choice.
In Sindh, proposed sites are: Sukkur, Larkana, Karachi, Bin Qasim, Korangi Creek, Khairpur, Thar (coal) and Lakhra (coal) etc.Proposed sites in Khyber include Hattar, Gadoon, Ghazi, D I Khan, Jalozai, Nowshera, Bannu, Chitral, Risalpur, Dargai (chromite), North Waziristan (chromite), Kurram (antimony), Waziristan, (copper), Chitral (antimony), Besham (iron, lead), Nizampur (iron) and Mohmand (marble).Process of establishing IEZs has slowed due to power shortage.
This was despite the fact that the Coto Chromite mining project had been in operation for more than five decades.
The charge against the minister was brought by former Congress MLA Lalatendu Bidyadhar Mohapatra aka Lulu who dug up an old case in which a truck belonging to Mallick was seized by the Parjang police for illegal transportation of chromite. Lulu claimed that in the case pertaining to 1998, the minister had to pay a fine of ` 95,000 following a directive from the Talcher subdivisional judicial magistrate.
Goncalves, who became a CEO of Cliffs after Casablanca's nominees won majority of the board in July, would rather treat the iron-ore assets in Australia and Canada, as well as the suspended chromite project in Canada, as noncore and eventually divest them, the newspaper explained.