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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: In this paper, the Coulomb binding energies have been used to estimate the melting temperatures of spinel and to predict the stability relations of the silicates. But the results of these calculations are limited and efforts should be made to improve the quality of the approximations.
14 citations
TL;DR: In this article, three samples of gouge from a U-mineralised fault, and two model samples, montmorillonite and muscovite, spiked with U, were heat-treated at a range of temperatures up to 1100°C.
14 citations
TL;DR: In this article, the relationship between hydrated layer formation during aqueous corrosion of silicates and retention of heavy elements (Fe, REE, actinides) was investigated based on the comparison of the dissolution behaviour of silicate glasses, silicate minerals implanted with increasing doses of lead ions (1×E+12 to 1×E +15 ions/cm2), sorption experiments on silica surfaces and direct precipitation of hydrosilicates.
Abstract: We have investigated the relationship between hydrated layer formation during aqueous corrosion of silicates and retention of heavy elements (Fe, REE, actinides). Our approach is based on the comparison of the dissolution behaviour of silicate glasses, silicate minerals implanted with increasing doses of lead ions (1×E+12 to 1×E+15 ions/cm2), sorption experiments on silica surfaces and direct precipitation of hydrosilicates. The characterization of reacted surfaces was performed by combining Rutherford backscattering spectrometry (RBS) for profiling heavy elements with Resonant Nuclear Reaction Analysis (RNRA) for hydrogen profilimetry. The accumulation of these elements does not necessarily imply a selective dissolution and can be explained by the “precipitation” of hydroxides or hydrosilicates.
14 citations
TL;DR: In this article, the Baskil section, a well-preserved middle Eocene Neo-Tethys sequence from eastern Turkey, has been studied and it is shown that silicate minerals (e.g., phyllosilicates, quartz, and albite) increased from 40.5 to 40.3
14 citations
01 Aug 1981
TL;DR: In this paper, it was shown that the coalescence of gold particles partially embedded in a carbon film is promoted by aqueous salt solutions and acids, and that this phenomenon imposes serious practical restrictions on the way in which this type of study can be carried out in order to obtain quantitative surface structural information.
Abstract: Microstructural features of crystal surfaces of the silicate minerals muscovite, margarite, montmorillonite, beidellite, and kaolinite have been investigated by studying the way in which gold atoms, deposited from the vapor phase, coalesce on these surfaces. Although detailed interpretation of the experimental data is in some cases open to speculation, the results obtained from these investigations show marked differences between the surface structures of the different silicate minerals and reveal microstructural features which would be difficult to detect by any other means. It would seem that this experimental technique can be used to obtain quantitative information concerning the composition of silicate surfaces provided the precautions are taken to preclude postdepositional migration and coalescence of the metal particles. The coalescence of gold particles partially embedded in a carbon film is promoted by aqueous salt solutions and acids. This phenomenon imposes serious practical restrictions on the way in which this type of study can be carried out in order to obtain quantitative surface structural information and does not seem to have been taken into account in many previous experimental investigations.
14 citations