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Chromite

Chromite is an iron chromium oxide: FeCr2O4. It is an oxide mineral belonging to the spinel group. Magnesium can substitute for iron in variable amounts as it...

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Hydrothermal synthesis, structural and impedance ... - ScienceDirect

Dec 27, 2014 ... Zinc chromite (ZnCr2O4) nanocrystalline spinel material was ... was also confirmed by Rietveld refinement study with lattice parameter a...

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Full Text (PDF) - Mineralogical Magazine

KEYWORDS: chromite, acapulcoite, ordinary chondrite, single-crystal X-ray diffraction, ... chromite. As structure refinement requires much less material, this will...

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Crystal chemistry and structural refinement of chromites from ...

Abstract: Crystal chemistry and structural refinement of 20 chromite crystals representative of different chromitites layers and xenoliths from the Critical Zone of...

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Magnetic Structure of Manganese Chromite

Jun 11, 2004 ... Although some discrepancies still remain, there is every reason to believe that these can be removed by further refinement of the theory and by...

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REE Program - Rare Earth Elements & Chromite

However, the metallurgy for Canadian ores containing REE involves a complex sequence of individual separation, refinement, alloying and formation stages...

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Thermal, structural, and impedance analysis of nanocrystalline ...

Nanocrystalline magnesium chromite spinel was synthesized through ... at 850 °C. Rietveld refinement study confirms the formation of single-phase cubic...

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Chromite Crystal Structure and Chemistry applied as an Exploration ...

Chromite, Unit Cell Parameter, Spinel, Mineral Exploration ..... 5 Portable Structural Refinement and Compositional proxy using a Terra XRD/XRF .. 90.

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refinement of an amesite-2h1 polytype from postmasburg, south africa

setts; the Saranovskoye chromite deposit in the North. Urals; the Dufek massif ... Refinement of the 2H2 structure of Antarctic amesite by Hall and Bailey (1979)...

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Pressure-volume equation of state for chromite and ...

Keywords: Magnesiochromite, chromite, high-pressure, diamond, equation of state .... Table 1 summarizes structural parameters and refinement details.

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Single crystal growth, structure refinement, ferroelastic domains and ...

Home · Titles list · Single crystal growth, structure refinement, ferroelastic domains ... The phase transitions in the Cu chromite were studied both by in situ optical...

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Electron microscopy of microwave-synthesized rare-earth ... - arXiv

The perovskite rare-earth (RE) chromite series (RE)CrO3 (RE = La, Ce, Pr, Nd, ... ray diffraction (XRD), Rietveld refinement of XRD pattern and complementary...

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Fully oxidized chromite in the Serra Alta (South Portugal) quartzites ...

Structure refinement of single-crystal. X-ray diffraction intensities unambiguously identifies the mineral as a chromite and the M0ss data are consistent with...

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Precipitation and dissolution of chromite by hydrothermal solutions ...

Jan 15, 2014 ... Abstract. Chromite is a typical refractory igneous mineral, precipitated from mafic magmas at relatively high temperatures. Chromites commonly...

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4 ALTERNATIVE TECHNOLOGIES FOR CHROMIUM-METAL ...

Chromite ore is processed in preparation for aluminum reduction in a ... A major improvement to the aluminothermic process involves the refinement of the...

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Patent US4533648 - Regeneration of copper chromite ... - Google

Aug 6, 1985 ... Spent copper "chromite" catalyst from the hydrogenation of ... Patchem A G Zur Beteiligung An, Method for the refinement of copal oils, resin oils...

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The Stillwater Complex chromitites: The response of chromite crystal ...

Nineteen chromite crystals from the A, B, E, G, H, J and K chromitite layers of the Peridotite Zone of the ..... refinement using the SHELX-97 program (Sheldrick,.

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HIGH PRESSURE STUDY OF SPINEL CHROMITE by ALLEN D.C. ...

4.1.2 Equation of State of the Spinel Chromite and Pressure. Medium ...... conjunction with a refinement software (Robert Downs, University of Arizona); the cell.

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پالايشگاه توليد فروآلياژهاي فرو كروم - پايگاه ملي داده هاي علوم زمين ...

سنگ کروميت مصرفي پالايشگاه فارياب براي توليد فروآلياژ فروكروم از معادن فارياب تأمين مي شود. به دليل بالا بودن نسبت كروم به آهن در سنگ معدن فارياب و مقادير...

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Chromite to magnetite transformation: compositional variations and ...

Chromite to magnetite transformation: compositional variations and cation ... Keywords. chromite, magnetite, mineral chemistry, X-ray structure refinement, cation...

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