About Chromite
Chromite, iron magnesium chromium oxide: (Fe,
Mg)Cr2O4, is an oxide mineral belonging to the spinel group.
Magnesium is always present in variable amounts, also aluminium
and iron substitute for chromium.
Chromite is found in peridotite and other
layered ultramafic intrusive rocks and also found in metamorphic
rocks such as serpentinites. Ore deposits of chromite form as
early magmatic differentiates. It is commonly associated with
olivine, magnetite, serpentine, and corundum.
The vast Bushveld igneous complex of South Africa is a large
layered mafic to ultramafic igneous body with some layers
consisting of 90% chromite making the rare rock type, chromitite.
Chromite is also used as a refractory
material.
Chromite from Albania
The only ore of chromium is the mineral chromite. In the western
hemisphere, chromite ore is produced only in Brazil and Cuba; By
comparison, about 80% of world production of chromite comes from
India, Iran, Pakistan, Oman, Zimbabwe, Turkey and Southern
Africa. Southern Africa itself produces about half of this.
Chromite is mined from the ultramafic rocks
in the Zhob District of Balochistan. Most of the chromite is of
metallurgical grade with Cr2O3 averaging 46% and a chrome to
iron ratio of 3:1.
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