Results 161 to 170 of about 1,143 (211)

Oxidation of stibnite byThiobacillus ferrooxidans

Antonie van Leeuwenhoek, 1977
Optimum pH, temperature and pulp density for microbiological leaching of museum-grade stibnite mineral has been investigated using a stibnite-adapted strain of Thiobacillus ferrooxidans. Optimum conditions were found to be pH 1.75, 35 C and 12g solid substrate per 100 ml of basal salts medium as the initial dose.
A E, Torma, G G, Gabra
openaire   +2 more sources

On the structure of stibnite (Sb2S3)

Journal of Materials Science, 1996
A new crystal structure is found to exist for stibnite which is orthorhombic, Pmmm. In this structure all the antimony and sulphur atoms have only one type of coordination, namely, trivalent and diavalent, respectively. They form a honey-comb-like planar network which is parallel to the xz-plane and stacked along the y-axis with the middle plane ...
P. Arun, A. G. Vedeshwar
openaire   +1 more source

Reduction of stibnite by hydrogen

Journal of the Less Common Metals, 1979
Abstract The reduction of stibnite by hydrogen in the absence and in the presence of sulfur acceptors has been investigated at atmospheric pressure and at temperatures of 200 – 600 °C. The activation energy of these processes has been found to be 17.4 kcal mol −1 (−7.2 × 10 4 J), 20.4 kcal mol −1 (−8.5 × 10 4 J), and 27.7 kcal mol −1 (−11.6 × 10
Arpad E Torma, Osman T Inal
openaire   +1 more source

Solubility of stibnite ore in HCl solutions

Industrial & Engineering Chemistry Research, 1995
In this study, the dissolution of stibnite, Sb 2 S 3 , which is an antimony ore, in HCl solutions was investigated, taking into consideration the effect of particle size, acid concentration, stirring speed, solid-to-liquid ratio, and temperature.
YAPICI, S, COPUR, M, COLAK, S
openaire   +2 more sources

Sonochemical Fabrication and Characterization of Stibnite Nanorods

Inorganic Chemistry, 2003
Regular stibnite (Sb(2)S(3)) nanorods with diameters of 20-40 nm and lengths of 220-350 nm have been successfully synthesized by a sonochemical method under ambient air from an ethanolic solution containing antimony trichloride and thioacetamide.
Hui, Wang, Yi-Nong, Lu, Jun-Jie, Zhu, Hong-Yuan, Chen   +3 more
openaire   +2 more sources

Weathering-induced Sb isotope fractionation during leaching of stibnite and formation of secondary Sb minerals [PDF]

Chemical Geology
In this work, we investigated the extent of antimony (Sb) isotopic fractionation during weathering of stibnite at supergene conditions. Antimony isotope data have been obtained from secondary Sb minerals collected from Pezinok, Dobšiná (both Slovakia ...
Marina Lazarov, Martin Stevko, Stefan Weyer   +2 more
exaly   +2 more sources

Mineralogy of the Stibnite-Antimonselite Series

International Geology Review, 1999
Minerals of the stibnite-antimonselite series, in close association with tiemannite, clausthalite, kullerudite, Se-bearing stibioluzonite, native gold, quartz, and barite, were discovered in Cambrian stratabound gold deposits at La'erma and Qiongmo, western Qinling, China.
Liu Jiajun, Liu Jianming, Liu Congqiang, Lu Wenquan, Liu Shirong, Su Wenchao   +5 more
openaire   +1 more source

Spectrographic Determination of Selenium in Stibnite

Applied Spectroscopy, 1984
Stibnite, Sb2S3, is present in low-temperature ore deposits of many genetic types. It occurs as the principal ore mineral in most antimony deposits, which contain only small amounts of other metals. The mineral is associated with arsenic, mercury, and thallium sulfides in Carlin-type gold deposits in which stibnite contains as much as 15 mol percent ...
Chris Heropoulos, James L. Seeley, Arthur S. Radtke   +2 more
openaire   +1 more source

Photopromoted oxidative dissolution of stibnite

Applied Geochemistry, 2015
Abstract Light irradiation plays an important role in the oxidative dissolution of Sb 2 S 3 . A qualitative mechanism was proposed through simulated experiments to describe the dissolution reaction under various ambient conditions, specifically darkness/light and aerobic/anaerobic conditions.
Xingyun Hu, Mengchang He, Linghao Kong
openaire   +1 more source

Distinct mechanisms of stibnite (Sb2S3) oxidative dissolution mediated by acid-generating and alkali-generating microorganisms within a wide pH range

Journal of Hazardous Materials
Indigenous microorganisms in antimony mining areas facilitate stibnite dissolution over a wide pH range, yet their mechanisms remain poorly studied. Herein, the acid-generating Bosea sp. AS-1 and the alkali-generating Pseudomonas sp.
Liyuan Ma, Xiaolu Lu, Hongmei Wang
exaly   +2 more sources