Results 221 to 230 of about 9,030 (251)

Roasting Kinetics of Molybdenite Concentrates

Canadian Metallurgical Quarterly, 2009
AbstractRoasting of MoS2 concentrate is an important step in the production of commercial molybdenum trioxide. The oxidation kinetics of two different molybdenum concentrates was investigated at temperatures from 440 to 640 °C. For both concentrates the oxidation is fairly slow and incomplete below 500 °C.
T. Marin, T. Utigard, C. Hernandez
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Real Space Crystallography in Molybdenite

Nature Physical Science, 1973
IN this letter we report further observations made during our development of a new electron diffraction technique, which was introduced under the title of ‘;Real Space Crystallography’;1. This technique involves the use of bend contour patterns, which are produced in thin domed or saucer-shaped foil specimens when an aperture is inserted in the back ...
G. J. TATLOCK, J. W. STEEDS
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Epidote in Molybdenite

1880
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Lime-scavenged reduction of molybdenite

Minerals Engineering, 1993
Abstract Of the numerous approaches proposed during the past two decades for molybdenum extraction, a new route of considerable promise is the direct reduction of molybdenite in the presence of the potent sulphur scavenger lime. This paper presents an overview of the researches carried out on this subject in our laboratory.
P.M. Prasad, T.R. Mankhand, P.Suryaprakash Rao   +2 more
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Reflectivity measurements on molybdenite

Economic Geology, 1966
The spectral reflectivity of molybdenite was measured on an unpolished cleavage flake, a polished vertical section, and a polished basal section, both in air and in oil. From these measurements the refractive index and the absorption were calculated. Reflectivity peaks were found at 625 nm in air measurements and at 620 nm in oil measurements.
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Etch Pits in Natural Molybdenite

Journal of Applied Physics, 1972
Etch pits 50 and more molecular layers deep have been observed on the surface of natural molybdenite crystals exposed to oxygen at temperatures in the region of 650°C. The geometry and manner of growth of the etch pits suggest that etching takes place through the intermediary of a two-dimensional gas of adsorbed oxygen molecules on the surface of the ...
John A. Fairbrother, Matthew D. Cowan
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Band structural properties of MoS2 (molybdenite)

Journal of Physics and Chemistry of Solids, 1980
Abstract Semiconductivity and superconductivity in MoS2 (molybdenite) can be understood in terms of the band structure of MoS2. We present here the band structural properties of MoS2. The energy dependence of neff and exeff is investigated. Using calculated values of neff and exeff, the Penn gap has been determined.
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Reflectivity measurements on molybdenite

Economic Geology, 1967
With reference to a paper published by J. H. Leow (see this Bibliography Vol. 31, No. 1, 12 E67-00463), it is pointed out that polishing produces a surface layer whose properties, such as reflectivity, may differ from theoretical properties of the same material.
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Water vapor desorption from molybdenite

Vacuum, 1996
Abstract The desorption of gases, especially water vapor, from molybdenite has been studied by cleavage or heating the sample. It was found that the major desorbed gases were H,H 2 and H 2 O at cleavage MoS 2 samples. The result shows that there was water as well as hydrogen in van der Waals gaps of MoS 2 crystals.
S Takagi, H Kazama, R Takamatsu, T Gotoh
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On rhenium content of molybdenite of Mount Mulat (Predazzo) and other Italian molybdenites

Geochimica et Cosmochimica Acta, 1963
Abstract Determinations of rhenium content in some Italian molybdenites were made by a colorimetric method. It seems possible that the rhenium content may be correlated to the deposit formation temperature.
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