CHROMIUM USES SERIES

One of the first minerals to separate from aĬooling magma large chromite ore deposits are thought to have been derived by Igneous rocks an accessory mineral in alpine-type peridotites also detrital.Ĭommon in all meteorites, except carbonaceous chondrites, and in lunar mareĬhromite is a common constituent of peridotite rocks and the Chemical Properties Chemical ClassificationĬhromite Physical Properties Crystal habitīrownish black brown to brownish black on thin edges in transmitted lightĤ.5 – 4.8 g/cm3 (Measured) 5.12 g/cm3 (Calculated)Ī cumulus mineral in ultramafic portions of layered mafic Metamorphic Serpentine deposits, and also in ultrabasic igneous rocks, and in The iron may be replaced by magnesium, and theĭiagnostic Features: The submetallic luster usually distinguishes chromite, but the green borax beadĬrystallography: Isometric hexoctahedral.

CHROMIUM USES SERIES

Series: Forms series with magnesiochromite and hercynite.Ĭhromite Composition: FeCr20 4. The weathering of chromite ore bodies can also lead to its concentration in placer deposits.Īssociation: Olivine, enstatite, plagioclase, serpentine, magnetite, ilmenite, pyrrhotite, pentlandite, ulvospinel. Referred to as chromitites, these rocks are the most important ores of chromium. The layers are preserved when the sedimentary rocks metamorphose to form serpentinite.

Almost pure chromite is found in similar layers in sedimentary rocks. It occurs as layers in a few igneous rocks that are especially rich in iron and magnesium. Chromite is most commonly found as an accessory mineral in iron- and magnesium-rich igneous rocks or concentrated in sediments derived from them. Chromite is dark brown to black in color and can contain some magnesium and aluminum. It is sometimes found as a crystalline inclusion in diamond. Chromite is usually massive or in the form of lenses and tabular bodies, or it may be disseminated as granules. Crystals are uncommon, but when found they are octahedral. Chromite is the most important ore of chromium. Chromite – Mtoroshanga, Makonde District, Mashonaland West, ZimbabweĬhromite is an oxide mineral that an iron chromium oxide with formula: FeCr2O4.

Chromium uses