CHROMITE (Iron Chromium Oxide)

Chromite is the most important ore of chromium from which it derives its name. It is because of this fact that chromite is found in some concentrated ore bodies.

Chromium – Wikipedia

Instead, nearly all chromium is commercially extracted from the single commercially viable ore chromite, which is iron chromium oxide (FeCr2O4). Chromite is also now the chief source of chromium for chromium pigments. Chromium is mined as chromite (FeCr2O4) ore.

WebElements Periodic Table of the Elements – Chromium – geological information

The most important ore is chromite (FeCr2O4) and this is found in Turkey, USA, South Africa, Albania, Finland, Iran, Madagascar, Russia, Southern Rhodesia, Transvaal, Cuba, Brazil, Japan, India, Pakistan, and the Philippines. Abundances of chromium in various environments. – Physical Properties of Chromium – CHROMIUM AND COMPOUNDS, HEXAVALENT CHROMIUM

Chromium metal is not found in nature, but is produced principally from the mineral chromite (chrome ore). An average chromium concentration of 12 ng/m3 and a maximum concentration of 41 ng/m3 were measured (Shikiya et al. INDOOR SOURCES AND CONCENTRATIONS.

White Rose Research – Effect of Microbially Induced Anoxia on Cr(VI) Mobility at … from Chromite Ore Processing – White …

This paper reports an investigation of microbially mediated Cr(VI) reduction in a hyper alkaline, chromium contaminated soil-water system representative of the conditions at a chromite ore processing residue (COPR) disposal site.

Chromium (IARC Summary & Evaluation, Volume 49, 1990)

Although chromium compounds were generally even more reactive than chromium compounds with purified DNA and isolated nuclei, 12 compounds of various solubilities (chromic chloride, chromic acetate, chromic nitrate, chromic sulfate, chromic potassium sulfate, chromium alum, neochromium, chromic hydroxide, chromic phosph…

NIST – Standard Reference Materials for Hexavalent Chromium in Contaminated Soil

Significant environmental remediation efforts are being conducted to address the hazards posed by the long-term terrestrial disposal of hexavalent chromium in the form of chromite ore processing waste.

Haz-Map Category Details – Home – Chromium and compounds

MINING, SMELTING, OR METALLURGY: Ore mining and crushing operations. Produce chromates from chromite. Chromates, the most common cause of allergic contact dermatitis, are released as hexavalent chromium from chrome-plated metal tools and machine parts.

University of Denver – Chromium and Manganese

The small resources of chromium and manganese ores in the United States are exhausted, so dependence on foreign sources for new metal is total. World production of chromite is a little over 107 tons, and world reserves are estimated at 7.6 x 109 tons.

CaltechTHESIS – Geology and ore deposits of the northeast quarter of the Seiad quadrangle, California – CaltechTHESIS

The laboratory study of tie chromite ores indicates that they are late magmatic (pneumotectic) ores whose structure is controlled by flowage, fracture-filling and replacement of the peridotite intrusions.

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