chromite
enUKchro·mite
C0338300 (krō′mīt′)chromite
(ˈkrəʊmaɪt)chro•mite
(ˈkroʊ maɪt)n.
Noun | 1. | chromite - a brownish-black mineral; the major source of chromium |
单词 | chromite | |||
释义 | chromiteenUKchro·miteC0338300 (krō′mīt′)chromite(ˈkrəʊmaɪt)chro•mite(ˈkroʊ maɪt)n.
chromiteenUKchromite(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. ..... Click the link for more information. ). 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]chromitechromiteenUK
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