ilmenite magnetite hematite

Magnetic properties of ilmenite, hematite and oilsand ...

Dec 01, 2002  Magnetic susceptibility of oxidation roasted ilmenite as a function of the peak intensity ratio between hematite and ilmenite. Interestingly, after reduction roasting, the FeO in ilmenite was not reduced to lower valence states (such as elemental iron, etc.), as no peaks due to elemental iron were observed in the X-ray diffraction spectra.

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Magnetic properties of ilmenite, hematite and oilsand ...

Ilmenite, hematite, and a rutile concentrate (LR Rutile) produced from the oil sands tailings (containing mainly leucoxene and rutile), were used in the study. It was observed that the magnetic susceptibility of ilmenite increased after either oxidation or reduction roasting

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ILMENITE-HEMATITE-MAGNETITE RELATIONS IN

ILMENITE-HEMATITE-MAGNETITE RELATIONS IN SOME EMERY ORES Josnrn M. Bnav, Mossachwsetls Institwte of Technology, Cambridge, Mass. Alsrnecr The principal mode of occurrence hematite and ilrnenite in emery ores from a num-ber of localities is in the form of unique exsolution intergrowths, suggesting unusual ...

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HEMATITE, GROUP: HEMATITE, ILMENITE

It looks like hematite, for the imitation of which it is used. It differs from hematite with the black drawn line. As inclusions it can be observed in hematite, magnetite, quartz, labradorite and some other gemstones. In Russia, on the Kola Penin., at the deposit Poachvumchorr, Khibiny, the size of ilmenite crystals reached 1 m. in cross-section.

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Magnetic clusters in ilmenite-hematite solid solutions

Magnetic clusters in ilmenite-hematite solid solutions C. Frandsen,1,* B. P. Burton,2 H. K. Rasmussen,1 S. A. McEnroe,3 and S. Mørup1 1Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark 2NIST, 100 Bureau Drive, Gaithersburg, Maryland 20878, USA 3Geological Survey of Norway, N-7491 Trondheim, Norway Received 22 May 2010; published 16

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Ilmenite Physical - Optical Properties, Varieties, Uses ...

Jun 30, 2019  Intergrowths with hematite or magnetite are common, and ilmenite can be mistaken for these minerals because of its opaque, metallic, gray-black color. Unlike magnetite, however, ilmenite is nonmagnetic or very weakly magnetic; and it can be distinguished from hematite by its black streak.

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Hematite-ilmenite (FerOr-FeTiO3) solid solutions: The ...

the preparation and magnetic characleization of a series of ilmenite-hematite solid solutions, which leads to a de-scription of the degree of long-range order of quenched samples. This work reports a drop-solution calorimetric study of the same samples, which provides enthalpies of mixing at room temperature of the same quenched sam-ples.

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Ilmenite composition in the Tellnes Fe–Ti deposit, SW ...

4) in magnetite with hematite in ilmenite to form a rim of a spinelliferous ilmenite exsolved from the magnetite (Duchesne 1972). This reaction reduces both the Ti content of magnetite and the hematite content of ilmenite. Because of the small proportion of magnetite relative to ilmenite, this reaction has mainly changed the primary composition ...

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HEMATITE, GROUP: HEMATITE, ILMENITE

It looks like hematite, for the imitation of which it is used. It differs from hematite with the black drawn line. As inclusions it can be observed in hematite, magnetite, quartz, labradorite and some other gemstones. In Russia, on the Kola Penin., at the deposit Poachvumchorr, Khibiny, the size of ilmenite crystals reached 1 m. in cross-section.

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Magnetization of exsolution intergrowths of hematite and ...

ilmenite an exchange bias occurs with a 40 mT shift at 10 K. Citation: McEnroe, S. A., P. Robinson, F. Langenhorst, C. Frandsen, M. P. Terry, and T. Boffa Ballaran (2007), Magnetization of exsolution intergrowths of hematite and ilmenite: Mineral chemistry, phase relations, and magnetic properties of hemo-ilmenite ores

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Magnetic properties of ilmenite‐hematite single crystals ...

Sep 10, 2011  Ternary plot of the hematite‐ilmenite‐magnetite composition of oxide grains based on assumptions and field‐cooled remanence experiments. Group 1 (blue squares) has the least variability and is dominated by hematite. Groups 2 (green triangles) and 3 (red circles) have greater variability, with more magnetite than group 1.

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Nanoscale haematite–ilmenite lamellae in massive ilmenite ...

A final and important point concerning the approximately 20 per cent geikielite component in the ilmenite is that the atomic composition of the ilmenite Fe layers is what determines the magnetic moment of lamellar magnetism in each lamella of ilmenite in a haematite host or each lamella of haematite in an ilmenite host (Robinson et al. 2002a ...

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Hematite-Ilmenite with Magnetite from the Ecstall Pluton ...

In order to distinguish between these two hypotheses we conducted rock magnetic experiments on single crystals of finely-exsolved hematite-ilmenite along a transect approaching the Quottoon Pluton. Reflected light, and SEM observations show grains of hematite and ilmenite as the dominant Fe-oxide throughout the Ecstall.

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Magnetic properties of ilmenite, hematite and oilsand ...

The magnetic properties of ilmenite, hematite and oilsand minerals following oxidizing and reductive roasting are investigated by Cui, Liu and Etsell (16). The oxidizing roasting at 800˚C has ...

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Hematite-ilmenite (FerOr-FeTiO3) solid solutions: The ...

the preparation and magnetic characleization of a series of ilmenite-hematite solid solutions, which leads to a de-scription of the degree of long-range order of quenched samples. This work reports a drop-solution calorimetric study of the same samples, which provides enthalpies of mixing at room temperature of the same quenched sam-ples.

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Ilmenite composition in the Tellnes Fe–Ti deposit, SW ...

4) in magnetite with hematite in ilmenite to form a rim of a spinelliferous ilmenite exsolved from the magnetite (Duchesne 1972). This reaction reduces both the Ti content of magnetite and the hematite content of ilmenite. Because of the small proportion of magnetite relative to ilmenite, this reaction has mainly changed the primary composition ...

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ILMAT: An Excel worksheet for ilmenite-magnetite ...

Buddington and Lindsley (1964) proposed the use of the compositions of coexisting ilmenite-hematite and magnetite-ulvospinel solid solutions in the system FeO-Fe 2 O 3 -TiO 2 as a geothermometer ...

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The role of hematite–ilmenite solid solution in the ...

The role of hematite–ilmenite solid solution in the production of magnetic anomalies in ground- and satellite-based data Gunther Kletetschkaa,b,*, Peter J. Wasilewskib, Patrick T. Taylorc aCatholic University of America, Washington, DC, USA bCode 691, NASA/Goddard Space Flight Center, Greenbelt, MD, 20771, USA cCode 921, NASA/Goddard Space Flight Center, Greenbelt, MD, 20771,

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Morphology and Microstructure of Magnetite and Ilmenite ...

Fe-Ti pairs in plutonic rocks are ulvöspinel-rich magnetite + ilmenite, magnetite + hematite and hematite + rutile (Buddington and Lindsley 1964). Particularly for Adirondack anorthosites and granulite gneisses, Buddington and Balsley (1961) attribute ilmenite-magnetite intergrowths to exsolution at subsolidus con - ditions.

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Magnetic properties of ilmenite-hematite single crystals ...

The two groups closest to the Quottoon Pluton contain magnetite within hematite and ilmenite lamellae. Reheating of the Ecstall pluton led to an increase in coercivity and magnetization, as well as to development of mixed phase hysteresis. These results indicate that shallow paleomagnetic directions from the western Ecstall pluton are not ...

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Ilmenite: Mineral information, data and localities.

Harrison R J, Redfern S A T (2001) Short- and long-range ordering in the ilmenite-hematite solid solution Physics and Chemistry of Minerals 28 399-412: 2001: 0: 476: 0008560: Ilmenite: Harrison R J, Redfern S A T (2001) Short- and long-range ordering in the ilmenite-hematite solid solution Physics and Chemistry of Minerals 28 399-412: 2001: 0 ...

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Ilmenite-hematite-magnetite relations in some emery ores ...

Magnetite, not a component of these exsolution intergrowths, is the most abundant opaque constituent in some polished sections, but is rare, or totally absent, in others, Ilmenite exsolves from hematite to sharp magnetite-hematite boundaries, showing that much of the hematite now present crystallized originally as hematite, and is thus not a ...

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Magnetic properties of ilmenite-hematite single crystals ...

The two groups closest to the Quottoon Pluton contain magnetite within hematite and ilmenite lamellae. Reheating of the Ecstall pluton led to an increase in coercivity and magnetization, as well as to development of mixed phase hysteresis. These results indicate that shallow paleomagnetic directions from the western Ecstall pluton are not ...

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Nanoscale haematite–ilmenite lamellae in massive ilmenite ...

A final and important point concerning the approximately 20 per cent geikielite component in the ilmenite is that the atomic composition of the ilmenite Fe layers is what determines the magnetic moment of lamellar magnetism in each lamella of ilmenite in a haematite host or each lamella of haematite in an ilmenite host (Robinson et al. 2002a ...

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The role of hematite–ilmenite solid solution in the ...

The role of hematite–ilmenite solid solution in the production of magnetic anomalies in ground- and satellite-based data Gunther Kletetschkaa,b,*, Peter J. Wasilewskib, Patrick T. Taylorc aCatholic University of America, Washington, DC, USA bCode 691, NASA/Goddard Space Flight Center, Greenbelt, MD, 20771, USA cCode 921, NASA/Goddard Space Flight Center, Greenbelt, MD, 20771,

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Magnetic properties of ilmenite-hematite single crystals ...

Ecstall pluton. The presence of this magnetite should exert a profound influence on the magnetic properties of the reheated portion of the pluton. [4] In this study, we examine the magnetic proper-ties of single crystals of ilmenite‐hematite collected along a transect across the full width of the Ecstall pluton. The Fe‐Ti oxides in this ...

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Morphology and Microstructure of Magnetite and Ilmenite ...

Fe-Ti pairs in plutonic rocks are ulvöspinel-rich magnetite + ilmenite, magnetite + hematite and hematite + rutile (Buddington and Lindsley 1964). Particularly for Adirondack anorthosites and granulite gneisses, Buddington and Balsley (1961) attribute ilmenite-magnetite intergrowths to exsolution at subsolidus con - ditions.

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Chemical and petrographic characterization of ilmenite

determined by Wilson et al. (1996), was from hematite-rich ilmenite with minor end-member magnetite to hematite-poor ilmenite with titanomagnetite, a trend indicating progressive diminution of Fe2O3. This trend was accompanied by decreasing MgO and Cr2O3, and by gradually increasing V2O3 to the point where magnetite

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Magnetic properties of ilmenite, hematite and oilsand ...

The magnetic properties of ilmenite, hematite and oilsand minerals following oxidizing and reductive roasting are investigated by Cui, Liu and Etsell (16). The oxidizing roasting at 800˚C has ...

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Ilmenite: An ore of titanium Uses and Properties

With just a glance it can easily be confused with hematite and magnetite. The differentiation is easy. Hematite has a red streak, while ilmenite has a black streak. Magnetite is strongly magnetic, while ilmenite is not magnetic. Occasionally ilmenite is weakly magnetic, possibly from small amounts of included magnetite.

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Ilmenite – Currumbin Minerals

Ilmenite is a black mineral with a submetallic to metallic luster. With just a glance it can easily be confused with hematite and magnetite. The differentiation is easy. Hematite has a red streak, while ilmenite has a black streak. Magnetite is strongly magnetic, while ilmenite is not magnetic.

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Ilmenite, magnetite, hematite, and copper in lavas of the ...

The opaque minerals in ten lava flows of the Keweenawan series of Michigan were studied microscopically by the writer. The basaltic lavas, which range in thickness from 100 to 1,400 feet, contain ilmenite, magnetite, hematite, intergrowths of magnetite-ilmenite and ilmenite-hematite, copper sulfides, native copper, and pyrite.

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Ilmenite: Mineral information, data and localities.

Harrison R J, Redfern S A T (2001) Short- and long-range ordering in the ilmenite-hematite solid solution Physics and Chemistry of Minerals 28 399-412: 2001: 0: 476: 0008560: Ilmenite: Harrison R J, Redfern S A T (2001) Short- and long-range ordering in the ilmenite-hematite solid solution Physics and Chemistry of Minerals 28 399-412: 2001: 0 ...

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(PDF) The role of hematite-ilmenite solid solution in the ...

Part of the calculated phase diagram for the hematite -ilmenite system (Fe 2 O 3 -FeTiO 3 ) after Burton and Lindsley (1991). Labels H, IL and HIL mark the antiferromagnetically ordered hematite-rich solution, ordered ilmenite structure solution, and disordered hematite -ilmenite solid solution, respectively.

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Lamellar magnetism in the haematite–ilmenite series as an ...

The role of hematite-ilmenite solid solution in the production of magnetic anomalies in ground and satellite-based data. Tectonophysics 347 , 166–177 (2002) ADS Article Google Scholar

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