Due to its unique facts and various uses, chromite is the most important element for businesses that deal in chromite and its related composition.
Chromite is among the notable oxide mineral comprises of oxygen, iron and chromium (FeCr2O4). Chromite ore manufacturers find chromite in the colors ranging from dark grey to black along with a metallic and submetallic luster with high specific gravity. Chromite ore is located in the metamorphic, sedimentary rocks and igneous rocks which are necessary and ultrabasic. They are produced when ricks that contain chromite are changed by weathering or heat.
Chromite is vital as it is the only ore of generated by chromium, an essential element for a broad variety of metal, manufactured items and chemical. Different other minerals have chromium, but nine of them are found in deposits which can economically be mined for the production chromium.
It is nothing less than a challenge to identify chromite. Several features should be considered for differentiating it from other metallic ores. Identification from hand specimen of chromite needs the following consideration:
The most critical hint to signify chromite is its alliance with metamorphic rocks and ultrabasic igneous rocks such as serpentinite.
Sometimes, chromite adapts the attribute of being magnetic. The magnetic property can be a bit confusing with magnetite. Ilmenite and chromite have close properties. Careful observations of streak, hardness, and specific gravity are needed for distinguishing the minerals in hand specimen.
|Physical Characteristics of Chromite|
|Color||Rarely brownish-black, gray to black|
|Luster||Metallic to submetallic|
|Mohs Hardness||5.5 to 6|
|Specific Gravity||4.0 to 5.1 (variable)|
|Diagnostic Properties||Streak, luster|
|Chemical Composition||FeCr2O4 with magnesium substituting for iron in significant amounts|
|Uses||A chromium ore|
Magnesium is a frequent substitute for iron in chromite. A series of robust solution exists between isomorphous mineral magnesiochromite (MgCr2O4) and mineral chromite (FeCr2O4). Intermediate specimens can be rich in content as far as magnesium and iron are concerned. For convenient communication, these minerals are frequently referred to as ‘chromite’ collectively.
A few mineralogists have a generic chemical composition of (Mg, Fe)(Cr, Al)2O4 for chromite. This chemical composition accepts multiple solution paths between chromite, spinel (MgAl2O4), hercynite (FeAl2O4), magnesioferrite (MgFe2O4), magnetite (Fe3O4), and magnesiochromite (MgCr2O4).
Due to many diverse compositions in the series mentioned above, metallurgists and geologists consider ‘chromite’ to be a member of solid solution series which has a significant content of Cr2O3.
Chromium is among those metals which are used to induce toughness, hardness and chemical resistance in steel. The alloy which is produced is called “stainless steel. When alloyed with nickel and iron, it produces a new item called “nichrome”. The nichrome resists high temperature and used in the production of ovens, heating units, and other appliances. Chromium alloys’ thin coatings are used as a plating on devices, auto parts and other products. The coat is commonly known as “chrome-plated”.
For chromite ore manufacturers, chromium is the most precious metal for their business. The uses and composition make chromite prominent in the metal family.