Results 211 to 220 of about 40,448 (263)
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An Examination of Platinum-Group Element Thiospinels
The Canadian Journal of Mineralogy and Petrology, 2023Abstract A review and discussion of platinum-group element thiospinels is presented, the context of which is a proposal accepted by the Commission of New Minerals, Nomenclature and Classification (voting proposal 17-H) made for the redefinition of cuproiridsite (ideally CuIr2S4), cuprorhodsite (ideally CuRh2S4), and malanite (ideally ...
Louis J. Cabri +3 more
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A survey of the determination of the platinum group elements
Talanta, 1987The platinum-group metals (PGMs), Ru, Rh, Pd, Os, Ir and Pt, are widely used as catalysts in petroleum and chemical processes. They find wide applications in automotive exhaust-gas control converters and are of immense importance to the electronics industry.
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Platinum Group Elements in the Feathers of Raptors and Their Prey
Archives of Environmental Contamination and Toxicology, 2002Platinum (Pt), palladium (Pd), and rhodium (Rh) concentrations were determined in the feathers of three raptor species in Sweden, the sparrowhawk ( Accipiter nisus), the peregrine falcon ( Falco peregrinus), and the gyrfalcon ( Falco rusticolus), as well as the main prey of the sparrowhawk (the house sparrow, Passer domesticus) and the gyrfalcon (the ...
K H, Jensen +3 more
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Platinum Group Elements in the Environment: Emissions and Exposure
2008PGEs (Pt, Pd, Ru, Ir, and Os) are a relatively new group of anthropogenic pollutants. Specific useful properties of these metals (high resistance to chemical corrosion over a wide range of temperatures, high melting point, high mechanical resistance, and high plasticity) have fomented rapid growth of new and existing applications in various economic ...
Aleksandra, Dubiella-Jackowska +2 more
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1993
Platinum group elements are ruthenium, rhodium and palladium (of similar weight as, but lighter than silver, the next element in the periodic table by atomic number) and osmium, iridium and platinum (of similar weight as, but lighter than gold, the next element in the periodic table by atomic number). As opposed to gold and silver, known probably since
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Platinum group elements are ruthenium, rhodium and palladium (of similar weight as, but lighter than silver, the next element in the periodic table by atomic number) and osmium, iridium and platinum (of similar weight as, but lighter than gold, the next element in the periodic table by atomic number). As opposed to gold and silver, known probably since
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Platinum-Group Elements in Cosmochemistry
Elements, 2008In a cooling solar nebula, five of the six platinum-group elements (PGE) condense as refractory-metal alloys at temperatures above the condensation of Fe-Ni metal. Non-refractory Pd condenses in solid solution with Fe-Ni. Such refractory alloys are preserved in some meteorites, although they are often highly altered.
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Ore Deposits of the Platinum-Group Elements
Elements, 2008The formation of ore deposits of the platinum-group elements (PGE) requires that their concentrations be raised about four orders of magnitude above typical continental crustal abundances. Such extreme enrichment relies principally on the extraction capacity of sulfide liquid, which sequesters the PGE from silicate magmas.
J. E. Mungall, A. J. Naldrett
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Sources of Platinum Group Elements in the Environment
2014Platinum group elements (PGE, i.e. Pt, Pd, Rh, Ir, Ru, Os) are among the least abundant elements in the Earth’s continental crust. PGE concentrations in urban and roadside environments are, however, increasing as a result of anthropogenic emissions.
Sebastien Rauch +1 more
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Anthropospheric Losses of Platinum Group Elements
2013The platinum group elements are among the rarest elements in the Earth’s crust yet each plays an important role in modern society. Despite their technological importance, little has been published on how much is lost during their extraction, processing, use and recycling. This chapter provides estimates of global losses of Pt, Pd, Rh, Ru and Ir at each
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Platinum-Group Element (PGE) Deposits
2000The platinum-group elements (PGE) comprise a geochemically coherent group of siderophile to chalcophile metals that includes osmium (Os), iridium (Ir), ruthenium (Ru), rhodium (Rh), platinum (Pt), and palladium (Pd). Based on association, the PGE may be divided into two subgroups: the Ir-subgroup (IPGE) consisting of Os, Ir, and Ru and the Pd-subgroup (
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