Results 101 to 110 of about 151 (127)
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Kinetics and thermodynamics of Eu(III) adsorption onto synthetic monoclinic pyrrhotite
Journal of Molecular Liquids, 2016Abstract The adsorption of Eu(III) from aqueous solutions onto monoclinic pyrrhotite (M-Pyr) was studied by batch experiments under various experimental conditions. M-Pyr was synthesized and characterized by XRD, FT-IR, SEM and potentiometric titration.
Tianhu Chen
exaly +2 more sources
International Journal of Minerals, Metallurgy and Materials, 2018
The flotation separation of chalcopyrite from monoclinic pyrrhotite using food-grade guar gum (FGG) as a depressant was studied through flotation tests, kinetic studies, dynamic potential measurements, adsorption experiments, and infrared spectral analyses.
Guo-Hua Gu, Gu Guo-Hua
exaly +2 more sources
The flotation separation of chalcopyrite from monoclinic pyrrhotite using food-grade guar gum (FGG) as a depressant was studied through flotation tests, kinetic studies, dynamic potential measurements, adsorption experiments, and infrared spectral analyses.
Guo-Hua Gu, Gu Guo-Hua
exaly +2 more sources
American Mineralogist, 2014
An equilibrium mixture of monoclinic pyrrhotite and pyrite was synthesized in the eutectic AlCl3-KCl melt at 525 K. The reaction 7FeS2(cr) + 12Ag(cr) = 8Fe0.875S(cr) + 6Ag2S(cr) was studied by an electromotive force technique in an all-solid-state electrochemical cell with an Ag+-conductive solid electrolyte in Ar at atmospheric pressure: (−) Pt | Ag |
Evgeniy Osadchii +2 more
exaly +2 more sources
An equilibrium mixture of monoclinic pyrrhotite and pyrite was synthesized in the eutectic AlCl3-KCl melt at 525 K. The reaction 7FeS2(cr) + 12Ag(cr) = 8Fe0.875S(cr) + 6Ag2S(cr) was studied by an electromotive force technique in an all-solid-state electrochemical cell with an Ag+-conductive solid electrolyte in Ar at atmospheric pressure: (−) Pt | Ag |
Evgeniy Osadchii +2 more
exaly +2 more sources
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Huashan Yan, Tingsheng Qiu
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Huashan Yan, Tingsheng Qiu
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A comparative study of the dissolution of hexagonal and monoclinic pyrrhotites in cyanide solution
Hydrometallurgy, 2000Abstract The extent and rate of dissolution of two natural pyrrhotite samples, one monoclinic (Fe 0.88 S) and the other hexagonal (Fe 0.90 S), were studied in alkaline cyanide solutions (pH 10). The effects of dissolved oxygen, particle size, and temperature were investigated.
M.N Lehmann +3 more
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Chemischer Informationsdienst, 1983
AbstractWie Messungen der Auflösungsgeschwindigkeiten des natürlichen Pyrrhotin (FeS1.14) in O2‐freien Lösungen ([H+] = 0.1, [Na+] = 0.9, [ClO4‐] = 1.0 mol kg‐1) mit Hilfe der Methode der rotierenden Scheibe zeigen, erfolgt die Auflösung kinetisch kontrolliert.
J. BUGAJSKI, H. + GAMSJAEGER
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AbstractWie Messungen der Auflösungsgeschwindigkeiten des natürlichen Pyrrhotin (FeS1.14) in O2‐freien Lösungen ([H+] = 0.1, [Na+] = 0.9, [ClO4‐] = 1.0 mol kg‐1) mit Hilfe der Methode der rotierenden Scheibe zeigen, erfolgt die Auflösung kinetisch kontrolliert.
J. BUGAJSKI, H. + GAMSJAEGER
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Intergrowths of hexagonal and monoclinic pyrrhotites in some sulphide ores from norway
Mineralogical Magazine, 1996AbstractPyrrhotites in polished sections from more than twenty stratabound massive sulphide and magmatic nickel-copper deposits in Norway were studied under the microscope using the magnetic colloid method. In both types of deposits, two distinct styles of intergrowths between monoclinic and hexagonal pyrrhotites were found: crystallographically ...
Gu Lianxing, Frank M. Vokes
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Enthalpy of formation of monoclinic pyrrhotite and its stability in the system Fe-S
International Geology Review, 1977Pyrrhotitc reacts easily to change of temperature and geochemical regime of sulfur. This limits its use as an indicator of physico-chemical conditions of formation.
N.I. Bezmen, T.A. Smolyarova
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Physics of the Earth and Planetary Interiors, 1995
Abstract Monoclinic pyrrhotite was synthesized using the silica tube technique and characterized by X-ray diffraction and magnetic measurement. The temperature dependence of the spontaneous magnetization Ms, between room temperature and the Curie point temperature Tc could be fitted by the function M s (T) ≈ (1 − T T c ) 0.52
A. Menyeh, W. O'Reilly
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Abstract Monoclinic pyrrhotite was synthesized using the silica tube technique and characterized by X-ray diffraction and magnetic measurement. The temperature dependence of the spontaneous magnetization Ms, between room temperature and the Curie point temperature Tc could be fitted by the function M s (T) ≈ (1 − T T c ) 0.52
A. Menyeh, W. O'Reilly
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