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kinds of chromites

  • Chromite: Chromite mineral information and data. - Mindat.org

    Chromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, Chromite-Spinel Series, Chromite-Magnetite Series and the Chromite-Magnesiochromite Series.

  • Chromite | Iron Ore | Minerals

    related chromites. A formidable contribution on the tectonic history, petromineralogy, geochemistry and the genesis of the chromitites and the associated ultramafic rocks of the area was made by Chatterjee and Banerjee (1964) and Banerjee (1972). We have also published a number of research articles in recent years (Chakraborty 1972, 1973, Chakraborty and Chakraborty 1974, 1976, Chakraborty and ...

  • SERICHO: A NEW MAIN GROUP PALLASITE WITH TWO TYPES OF ...

    mild zoning (Fig. 2), these chromites likely formed contemporaneously with olivine and subsequently rip- ened, aided by Cr chemical transport through S- and P-

  • TWO CONTRASTING TYPES OF ZONED CHROMITE OF THE MT. …

    The reason why the names retrogressive-and igneous-types are used may be explained in the discussion on the genesis of chromite-

  • Cation distribution and magnetic properties of natural ...

    The presence of two types of chromites, referred to as type I and type II, has been confirmed. Type I has Fe cations situated on octahedral (B) sites only, while type II has Fe on both octahedral ...

  • Methods for the Analysis of Mineral Chromites and ...

    This report describes the elemental characterization of chromite and related materials at the Bureau of Mines, Albany Research Center. Analytical methods for determining the major constituents, representing extensive experience, refinement, and development, are described and fully annotated.

  • Fractal evaluation of particle size distributions of ...

    The five types of chromite ore samples obtained from the run-of-mines, namely Bantlı which belongs to Karaburhan in Eskisehir, Turkey; Dereboyu, Kef, Lasir and Yunuskuyu which belong to Guleman in Elazig, Turkey are used in the studies.

  • (PDF) Grindability and Magnetic Property of Chromites from ...

    PDF | Mineralogical properties of eight kinds of chromites from various localities, and their effects on the grindability and magnetic property were investigated. The results obtained are ...

  • Exsolution in metamorphosed chromite from the Red Lodge ...

    Exsolution in metamorphosed chromite from the Red Lodge district, Montana Pernrcre J. Lopr,nsrl AND Bnucp, R. LtplN U.S. Geological Survey, M.S. 954 Reston, Va 22092 Abstract Chromite in ultramafic rocks near Red Lodge, Montana has undergone exsolution during upper amphibolite facies metamorphism. Three textural types of exsolved chromites were found. Type A grains consist of an …

  • Characterization of natural chromite ((Mg, Fe n) (AI ...

    Two distinctly different types of chromite were identified. Type I chromites have low Fe3+/Fe 2+ ratios (between 0.2 and 0.4), and contain 3 cations for every 4 oxygen ions in the chemical formula unit. Type II chromites, on the other hand, have Fe3*/Fe 2+ ratios between 0.7 and 1.3, and contain considerably less than 3 cations per 4 oxygen ions in the formula unit. Type II chromites result ...

  • Mineral Resources - Types, Characteristics, Uses, and ...

    What are Mineral Resources? A mineral is a naturally occurring substance, representable by a chemical formula, that is usually solid and inorganic, and has a crystal structure. A mineral is a pure inorganic substance that occurs naturally in the earth’s crust.

  • Magmatic Deposits / Prospecting Guidelines - Earth science

    Magmatic Deposits / Prospecting Guidelines Magmatic Deposits / Prospecting Guidelines Abridged and adapted to HTML from Notes From The Prospecting School on the Web By Luca Riccio for the B.C. & Yukon Chamber of Mine

  • GRINDABILITY AND MAGNETIC PROPERTY OF CHROMITES FROM ...

    Mineralogical properties of eight kinds of chromites from various localities, and their effects on the grindability and magnetic property were investigated.

  • Characterization of natural chromite ((Mg,FeII)(Al,FeIIICr ...

    Two distinctly different types of chromite were identified. Type I chromites have low Fe 3+ /Fe 2+ ratios (between 0.2 and 0.4), and contain 3 cations for every 4 oxygen ions in the chemical formula unit.

  • CHROMITE SPINEL FORMATION IN STEELMAKING SLAGS

    A phase analysis revealed two types of chromium oxide phases, calcium chromites and chromite spinels, which are dependent on the chemistry and the basicity of the slag.

  • CHEMICAL COMPOSITION OF THE ZHOB VALLEY CHROMITES, …

    578 S. A. BILGRAMI AND C. O. INGAMELLS two or three meters. Larger globules have been found in the area in the past. In thin section two types of chromites have been recognized:

  • EP1590494A1 - A method for increasing the chrome to iron ...

    These substitutions are at the origin of different types of chromites distinguished, among other things, by their chrome to iron ratios. In the geological environment, the chrome to iron ratios of chromites vary from 1.3 to 4.0 in many stratiform or podiform deposits. Chromites possessing chrome to iron ratios higher than 3, are rare in nature.

  • Möss spectroscopy and magnetic susceptibility studies ...

    A series of naturally-occurring chromites from the Bushveld Complex in South Africa, have been studied by Möss spectroscopy at 300, 136, 110, 81, 77 and 4.8 K. Magnetic susceptibility measurements have been taken on two representative samples between 300 and 4 K. The presence of two types of

  • Geosciences | Free Full-Text | Contrasting Textural and ...

    Inferred temperature conditions suggest that the zoned chromites, homogeneous chromites, and their hosts are equilibrated at different metamorphic conditions. In this paper, various mechanisms during the cumulus to subsolidus stages are explored in order to understand the origin of the two contrasting types of chromites.

  • Refractory- and metallurgical-type chromite ores, Zambales ...

    Refractory- and metallurgical-type chromite ores, Zambales ophiolite, Luzon, Philippines M. Hock 1, G. Friedrich, W.L. Pliiger and A. Wichowski Institut fur Mineralogie und Lagerst~ittenlehre, Rheinisch-Westf~ilische Technische Hochschule Aachen, WiillnerstraBe 2, D-5100 Aachen, FRG Abstract. The Zambales ophiolite is the major source of chromite ore in the Philippines. The chromitites are ...

  • Chromite: The mineral Chromite information and pictures

    Chromite, the principle ore of the element chromium, is a commercially valuable mineral. However, due to mining restrictions and the fact that Chromite is not commonly found in crystallized form, it is not well-represented in mineral collections.

  • Chromite typology and composition characterized through ...

    However, the chromites from the three types of orebodies considered are grouped following parallels trends. Podiform chromites from ophiolitic massifs have lower reflectance than chromites from continental ores (Ojén massif) for the same #Cr value. Behaviour of metamorphosed chromites is intermediate. This fact may be related with the magnesium content (see

  • Mineralogical characterisation of chromite in the UG2 Reef ...

    These two reef types were also found to be identical in the composition of the chromites present. In addition, in both of these almost unaltered reef types it was found that chromite showed small recoveries by flotation. On the other hand, it was found that the UG2 affected by IRUP intrusion was affected by post‐magmatic alteration that had overprinted primary textures and compositional ...

  • Types of Chromites on End of the Line - trello.com

    in Brain Storms and Sand Storms on End of the Line

  • Petrogenetic implication of the M6ss hyperfine ...

    Chromites from two horizons of the Sukinda area (India) marked as 'grey ore' and 'brown ore' zones have been studied by 57Fe M6ss spectroscopy, which revealed that both chromite types are

  • Chromite - Wikipedia

    Chromite is an iron chromium oxide: FeCr 2 O 4. It is an oxide mineral belonging to the spinel group . Magnesium can substitute for iron in variable amounts as it forms a solid solution with magnesiochromite (MgCr 2 O 4 ); [5] substitution of aluminium occurs leading to hercynite (FeAl 2 O 4 ).

  • Chromite: The only mineral ore of chromium metal

    Chromite is the only ore of chromium, a metal essential for making stainless steel, nichrome, chrome plating, pigments, refractories, chemicals and pharmaceuticals.

  • chrome.types - Google Chrome

    Chrome settings. The ChromeSetting prototype provides a common set of functions (get(), set(), and clear()) as well as an event publisher (onChange) for settings of the Chrome browser.

  • Chromite Mineral Data

    Chromite Antigorite Comments: Chromite veins in yellow to green antigorite with picrolite, chromian antigorite and dolomite (polished section). Location: Wood's Mine, near 'Texas', Little Britain Township, Lancaster County, Pennsylvania, USA.