magnetite or cromite

  • magnetite an overview ScienceDirect Topics

    The controls on magnetite solubility in mafic liquids are, like those for chromite, predominantly compositional. Increasing f O 2 decreases magnetite solubility, whereas the addition of H2O to a melt can suppress silie crystallization while permitting continued magnetite crystallization. There may also be some magma 

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  • Detrital magnetite and chromite in Jack Hills quartzite cobbles

    Oct 1, 2016 Rock magnetic studies suggest the mineral carrier is magnetite. Herein, we investigate the magnetic mineral carriers in cobble samples through scanning electron microscope and microprobe analyses, conduct an interlaboratory paleomagnetic study to evaluate sensitivities required to evaluate the weak 

    >>READ
  • Chromite Wikipedia

    Ore deposits of chromite form as early magmatic differentiates. It is commonly associated with olivine, magnetite, serpentine, and corundum. The vast Bushveld igneous complex of South Africa is a large layered mafic to ultramafic igneous body with some layers consisting of 90% chromite making the rare rock type, 

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  • Simulating Porous Magnetite Layer Deposited on Alloy MDPI

    Jan 2, 2018 Comparison with the PDF data (magnetite, trevorite, and chromite) showed that the lattice constants of the electrodeposited magnetite layer and flake samples were contained within the range of the lattice constants of the PDF data for magnetite (Table 3). The peak broadening of XRD pattern indies that 

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  • 4.2.1.5.1.3 Chromitemagnetite solid solutions SpringerLink

    Summary This document is part of Subvolume B 'Part B: Spinels, Fe Oxides, and FeMeO Compounds' of Volume 12 'Magnetic and Other Properties of Oxides and Related Compounds' of LandoltBörnstein

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  • 4.2.1.5.1.3 Chromitemagnetite solid solutions SpringerLink

    Summary This document is part of Subvolume B 'Part B: Spinels, Fe Oxides, and FeMeO Compounds' of Volume 12 'Magnetic and Other Properties of Oxides and Related Compounds' of LandoltBörnstein

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  • Chromite in Komatiites, 1. Magmatic Controls on Crystallization and

    An additional mode of occurrence of chromite and Crbearing, magnetiterich spinel is within massive Fe–Ni sulphides (Groves et al., 1977 Barnes et al., 1988a Frost & Groves, 1989a Lesher, 1989). Crspinels may occur as concentrations at the upper margin of massive sulphide orebodies, more rarely around their other 

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  • Ilmenite, Magnetite and Chromite Beach Placers from CiteSeerX

    Author version: Resource Geology, vol.60(1) 7186. Ilmenite, Magnetite and Chromite Beach. Placers from South Maharashtra, Central West Coast of India. By. Anup R. Gujar, Nawso V. Ambre, Premchand G. Mislankar and Sridhar D. Iyer. Council of Scientific and Industrial Research. National Institute of Oceanography.

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  • ALEX STREKEISENMagnetite

    Chromite series: with Cr3+ ion. Each series is further defined by the dominant bivalent ion: Spinel series: Common spinel: MgAl2O4. Hercynite: FeAl2O4. Gahnite: ZnAl2O4. Galaxite: MnAl2O4 chromite series: Chromite: Fe2+Cr2O4. Magnesiochromite: MgCr2O4 magnetite series: Magnetite: Fe2+Fe23+O4. Magnesioferrite: 

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  • The Crystallization of Spinel from Basaltic Liquid as a Jstor

    Department of Geological Sciences, Queen's University, Kingston, Ontario. ABSTRACT. The effect of changing oxygen fugacity on the equilibrium crystallization of two basaltic melts has been determined at 1 atm total pressure. Liquidus curves for spinel (chromitetitaniferous magnetite), hexagonal oxide, olivine, pyroxene, 

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  • Concentration of chromite by means of magnetic carrier using

    Mar 14, 2014 Abstract: Chromite recovery was studied using a magnetic carrier technology. Heavy media grade magnetite was used as the magnetic carrier. The effect of various reagents such as sodium oleate (NaOl) as a collector and carboxymethyl cellulose (CMC) as well as quebracho tannin as depressants on 

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  • ON THE COMPOSITION OF SOME INDIAN CHROMITES*

    the nine samples of chromite on the triangular diagram, they are all found within the field of aluminian chromites. The orissa deposits are mostly of metallurgical grade with cr: Fe ratio exceeding 3 : 1. rn the chromite from Singhbhum, Bihar, there is an appreciable amount of normative magnetite. rn the case of the Kondapalle 

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  • Chromite: Chromite mineral information and data. Mindat

    Spinel Group . It apparently forms a complete solid solution series with many other members of the group, eg. in the ChromiteHercynite Series, ChromiteSpinel Series, ChromiteMagnetite Series and the ChromiteMagnesiochromite Series . It is the iron analogue of Zincochromite, Cochromite, Manganochromite and 

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  • Elastic constants of magnetite, pyrite and chromite Springer Link

    This paper deals with the determination of the elastic constants of Magnetite, Pyrite and Chromite by utilising this new method. 2. MAo~:rrrE. Magnetite belongs to the isomorphous sedes of oxide minerals of the. Spinel group with the general formula R203.RO. In magnetite both the radicals ate ~ron, one being ferrous and 

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  • Chromite: Chromite mineral information and data. Mindat

    Spinel Group . It apparently forms a complete solid solution series with many other members of the group, eg. in the ChromiteHercynite Series, ChromiteSpinel Series, ChromiteMagnetite Series and the ChromiteMagnesiochromite Series . It is the iron analogue of Zincochromite, Cochromite, Manganochromite and 

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  • Natural Magnetite: an efficient alyst for the degradation of organic

    May 11, 2015 The positive effect of exsolved pleonaste on the heterogeneous alytic ability of natural magnetite may be ascribed to its spinel structure, which is consistent with the strong alytic ability of the other spinel structures, such as chromite and zinc spinel. This observation may be explained in terms of the 

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  • Effectiveness of selective chemical treatments on concentrating

    The chemical treatments were effective on concentrating iron oxides so to improve the mineralogical analysis of this nickel ore. Mössbauer analysis revealed that NaOH selectively removed silies and chromite from samples, whereas CBD dissolved hematite, goethite, and partially oxidized nonstoichiometric magnetite.

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  • Chromite Wikipedia

    Ore deposits of chromite form as early magmatic differentiates. It is commonly associated with olivine, magnetite, serpentine, and corundum. The vast Bushveld igneous complex of South Africa is a large layered mafic to ultramafic igneous body with some layers consisting of 90% chromite making the rare rock type, 

    >>READ
  • Petrology of Metamorphosed ChromiteBearing Ultramafic Rocks

    Chromite occurs as a ubiquitous accessory mineral and as local segregated lenses. Optically, much of the chromite is homogeneous some chromite grains have magnetite and rare ferritchromit rims. Ferritchromit+chlorite(?) intergrowths occur in some accessory aluminumrich chromite. Compositionally, some segregated 

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  • ChromiteMagnetite Series Mindat

    A series between Chromite and Magnetite with intermediate members Ferrian Chromite, Ferrichromite, Chrommagnetite and Ishkulite .

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  • magnetite an overview ScienceDirect Topics

    The controls on magnetite solubility in mafic liquids are, like those for chromite, predominantly compositional. Increasing f O 2 decreases magnetite solubility, whereas the addition of H2O to a melt can suppress silie crystallization while permitting continued magnetite crystallization. There may also be some magma 

    >>READ
  • Chromite Sandatlas

    The appearance of chromite may be similar to magnetite (which also belongs to the spinel group but has slightly different structure). Both are opaque and occur in octahedral crystals (double pyramids with eight crystal faces). However, both minerals occur more often as anhedral or granular masses. It isn't hard to tell them 

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  • Magnetite: The mineral Magnetite information and pictures

    Detailed description, properties, and locality information guide about the magnetic mineral magnetite.

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  • Detrital magnetite and chromite in Jack Hills quartzite cobbles

    Oct 1, 2016 Rock magnetic studies suggest the mineral carrier is magnetite. Herein, we investigate the magnetic mineral carriers in cobble samples through scanning electron microscope and microprobe analyses, conduct an interlaboratory paleomagnetic study to evaluate sensitivities required to evaluate the weak 

    >>READ
  • Chromite: The only mineral ore of chromium metal Geology

    Some mineralogists give a generalized chemical composition of (Mg,Fe)(Cr,Al)2O4 for chromite. This composition recognizes multiple solid solution paths between chromite and hercynite (FeAl2O4), spinel (MgAl2O4), magnesiochromite (MgCr2O4), magnetite (Fe3O4), and magnesioferrite (MgFe2O4). Because of the many 

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  • Traceelement fingerprints of chromite, magnetite and sulfides from

    Jun 24, 2015 Trace‑element fingerprints of chromite, magnetite and sulfides from the 3.1 Ga ultramafic–mafic rocks of the Nuggihalli greenstone belt, Western Dharwar craton (India). Ria Mukherjee1,2 · Sisir K. Mondal1,4 · José M. González‑Jiménez3,5 ·. William L. Griffin3 · Norman J. Pearson3 · Suzanne Y. O'Reilly3.

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  • Chromite mineral Britannica

    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.

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  • Monograph on Chromite Indian Bureau of Mines

    Jul 31, 2013 ferric oxide, there may be transition to magnetite, Fe3O4. Thus chromite is represented by the general formula R"O.R'"2O3 where R" stands for a bivalent metal, mainly magnesium, ferrous iron with minor amounts of zinc, manganese, and nickel, and R"' represents a trivalent metal,. i.e. chromium aluminum 

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  • Elastic constants of magnetite, pyrite and chromite Springer Link

    This paper deals with the determination of the elastic constants of Magnetite, Pyrite and Chromite by utilising this new method. 2. MAo~:rrrE. Magnetite belongs to the isomorphous sedes of oxide minerals of the. Spinel group with the general formula R203.RO. In magnetite both the radicals ate ~ron, one being ferrous and 

    >>READ
  • Alteration of Chromite During Serpentinization Semantic Scholar

    ferritchromit' rind (<1 wt percent Al,O, (3.5 wt percent MgO )25 wt percent CrrO"). This rind, which completely encloses the chromite core, has an irregular overgrowth of magnetite ()85 wt percent iron oxide) which is embayed by serpentinite silies. The out line of the original chromite grain may possibly be represented 

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  • (V‐Ti) Bearing Magnetite Bands in Bhakatarhalli Chromite Mine

    Jun 27, 2014 Högbomite, a rare exotic mineral, is found to be associated with the vanadiferous–titaniferous (V‐Ti) bearing magnetite bands at Bhakatarhalli, Nuggihalli greenstone belt, western Dharwar Craton, India. We report on a second occurrence of högbomite from the Dharwar craton in Karnataka, which is the 

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