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Silicate minerals
About: Silicate minerals is a research topic. Over the lifetime, 1794 publications have been published within this topic receiving 67064 citations.
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TL;DR: Zhang et al. as discussed by the authors showed that oxygen self diffusion under hydrothermal conditions is due to molecular H2O diffusion, not due to the self diffusion of oxygen itself.
46 citations
TL;DR: In this paper, the order of sorption affinities of transition metals for Na-montmorillonite, treated red clay, and hydrated ferric oxide was investigated.
Abstract: Experiments of sorption of Mn, Co, Ni, Cu and Zn on manganese oxides, hydrated ferric oxide, Na-montmorillonite and treated red clay are carried out in connection with the mechanisms by which transition metals are removed from seawater in marine environments. The order of sorption affinities of transition metals for Na-montmorillonite, treated red clay and hydrated ferric oxide is Mn
46 citations
46 citations
TL;DR: In this article, the authors investigated the weathering of non-opaque heavy minerals in five English soil profiles developed in texturally homogeneous Late Devensian coversands by spline interpolation of detailed mineral counts.
Abstract: Summary Weathering of non-opaque heavy minerals in five English soil profiles developed in texturally homogeneous Late Devensian coversands has been investigated by spline interpolation of detailed mineral counts. Values for D90 (90% mineral depletion) derived from the splines suggest a depletion sequence that is generally applicable to moderately acid weathering of sediments: apatite (+ olivines) > amphiboles + pyroxenes > epidotes > garnets > more resistant minerals. Weathered minerals form three groups, each of which is eliminated in an almost discrete stage. Weathering is accompanied by a characteristic developmental sequence of surface textures. Weathering rates of most of the silicate minerals are probably determined mainly by their Fe2+ contents, effective surface areas and soil pH. Considerable variations in the depth and severity of weathering between profiles may reflect differences in vegetation histories. Heavy mineral weathering is related to soil chemistry to examine its implications for podzol genesis.
46 citations
TL;DR: In this article, the authors used various techniques including scanning electron microscopy/energy dispersive X-radiography, electron spectroscopy for chemical analysis, Mossbauer Spectroscopy and gas chromatography-mass spectrometry have been used to analyze these layers in samples from Sweden and some other European countries.
Abstract: Thin black layers often occur on building stone in polluted areas. Various techniques including scanning electron microscopy/energy dispersive X-radiography, electron spectroscopy for chemical analysis, Mossbauer spectroscopy and gas chromatography-mass spectrometry have been used to analyze these layers in samples from Sweden and some other European countries. The layers mainly consist of various iron oxides and iron oxide hydroxides, sulphates, soot and silicate minerals, with smaller amounts of metal, rubber and asphalt particles, and numerous organic constituents in low concentration. Air pollutants, and to some degree minerals from the interior of the stone, are the main source of the components which form the black layers.
46 citations