How was chromite formed?
Chromite is used as a refractory in the production of steel, copper, glass and cement. Chromite occurs as a primary accessory mineral in basic and ultrabasic igneous rocks. Economic deposits form by crystallisation of chromite from a cooling magma, resulting in large stratiform deposits or smaller pod-like deposits.
What is the composition of chromite ore 12?
Answer: Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr2O4).
What is the symbol for chromite?
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 (MgCr2O4).
What is the formula for the chromate ion?
CrO4-2
Chromate | CrO4-2 – PubChem.
Is chromite felsic or mafic?
Occurrences: Chromite is a cumulate mineral which is found in ultramafic portions of layered mafic intrusions or in serpentines and other metamorphic rocks derived from the alteration of ultrabasic rocks.
What is refractory chromite?
Refractory and metallurgical chromite deposits are spatially separated and related to different lithologic associations, which crystallized from different parental magmas. — Refractory chromite ores (30-44 wt% Cr2O3; 20-30 wt% Al2O3) are linked with the peridotite-troctolite-olivine gabbro lineage.
Where can I find chromite?
Chromite ore is mined in over 20 countries, but about 80% of production originates from four countries: South Africa, India, Kazakhstan, and Turkey (Kleynhans et al., 2012). Figure 11.2. Map of locations, geological types, and size (millions of tons of Cr) of global chromite resources and reserves.
What are the problems faced by the Sukinda chromite mine?
In the Sukinda mining area, terioration in surface and ground water quality. Godgul and Sahu ND to 1791 µg/l in quarry water. Das and Singh [9] reported that inhabitants residing at the Sukinda chromite valley. tion, thus posing a threat to human and animal health [12]. One to environment and ecosystem malfunction.
Are Sukinda Valley chromitites of Orissa stratiform in nature?
TiO2 lacks significant correlation with the major element composition of chromite. It is concluded that the Sukinda Valley chromitites of Orissa are predominantly stratiform in nature and were presumably formed in situ by crystal settling, the layering having been accentuated by the fluctuation of FO2.
Does Sukinda water contain hexavalent chromium?
Surface water and ground water in Sukinda region from Ecuador’s London contain hexavalent chromium well above the permissible limits of 0.05 mg/l (ppm). embassy – Oscar Grenfell The unsafe chromium pollution produces adverse health effects in people in the vicinity who are Events in Venezuela are similar exposed to it.
What is the soil composition of chromite mining site in Odisha?
Soil samples from chromite mining site and its adjacent overburden dumps and fallow land of Sukinda, Odisha, were analysed for their physico-chemical, microbial and metal contents. Chromite mine soils were heterogenous mixture of clay, mud, minerals and rocks.