Search results
People also ask
Is chromite a crystalline mineral?
What does chromite mean in chemistry?
What is chromite used for?
Is chromite a chromium oxide?
Chromite is a crystalline mineral composed primarily of iron (II) oxide and chromium (III) oxide compounds. It can be represented by the chemical formula of FeCr 2 O 4. It is an oxide mineral belonging to the spinel group.
General bibliography. External links. Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal. [7] Chromium metal is valued for its high corrosion resistance and hardness.
Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4 ). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity.
Chromite, relatively hard, metallic, black oxide mineral of chromium and iron (FeCr2O4) that is the chief commercial source of chromium. It is the principal member of the spinel series of chromium oxides; the other naturally occurring member is magnesiochromite, oxide of magnesium and chromium.
- The Editors of Encyclopaedia Britannica
Formula: Fe2+Cr3+2O4. Colour: Black. Lustre: Resinous, Greasy, Metallic, Sub-Metallic, Dull. Hardness: 5½. Specific Gravity: 4.5 - 4.8. Crystal System: Isometric. Member of: Spinel Subgroup > Oxyspinel Group > Spinel Supergroup. Name: Chromite was named in 1845 by Wilhelm Haidinger in allusion to its composition.
Turkey becomes world leader in chromite production. 1865. Important discovery of chromite in South Africa and Zimbabwe (only exploited 50 years later). First patent for the use of chrome in steel. 1879. First recorded use of chrome in refractory applications. 1882. Chromite discovered in Australia. 1892.
