Results 271 to 280 of about 5,514 (291)
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Thermal Equation of State of Aluminum-Enriched Silicate Perovskite
Science, 1999Inferences of the chemical homogeneity of Earth's mantle depend on comparing laboratory-derived equations of state of mantle phases with seismically determined properties of the material in situ. A uniform chemical composition of the entire mantle has been found to be consistent with measurements, to date, of these properties for the end ...
Jianzhong Zhang, Donald J. Weidner
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Comparison of iron and aluminum silicates with the TON topology
Zeolites, 1992Abstract A crystalline ferrisilicate analog of ZSM-22 was synthesized and characterized by chemical analysis, XRD, framework i.r., e.s.r., d.t.a./d.t.g., ion-exchange, magnetic susceptibility, and catalytic techniques. Scanning electron micrographs and the sorption of water, n-hexane, and cyclohexane show the absence of amorphous material outside as ...
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Stability of alumino silicate refractories to aluminum alloys
Refractories, 1968A comparative study was made of the stability of commercial aluminosilicate refractories in aluminum melts. All of the studied refractories (containing from 32 to 62% Al2O3) react with liquid aluminum alloys. Of the studied refractories, fireclay brick for blast furnaces (GOST 1598-53, class A) have the best stability.
V. S. Rudenko +3 more
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Heat capacity of aluminum-free liquid silicates
Geochimica et Cosmochimica Acta, 1985Abstract Drop calorimetry measurements made between 900 and 1800 K are reported for six MO-SiO 2 liquids ( M = Li 2 , K 2 , Sr and Ba ) and two titanium alkalisilicate melts. These results, together with data from the literature, are used to derive a model for calculating the heat capacity of Al-free silicate melts as a function of ...
Y. Bottinga, Pascal Richet
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Defect Centers in Microporous Aluminum Silicate Materials
The Journal of Physical Chemistry B, 1998An ab initio (DFT PW91) periodic model based on silica sodalite is applied to investigate the structure and energetics of formation and interconversion of defect centers in zeolites and related microporous materials. We calculate low energies of formation for a new range of defects including peroxy species which should be important Lewis and redox ...
Alex Kuperman +3 more
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The Thermodynamic Properties of the Aluminum Silicates [PDF]
The Journal of Physical Chemistry, 1966 J. L. Holm, O. J. Kleppa
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Methyl Trichlorosilane Preparation of Methyl Aluminum Silicate
2012 Third International Conference on Digital Manufacturing & Automation, 2012Methyl trichlorosilane which a waste in the production of silicone prepared methyl aluminum silicate. Methyl trichlorosilane hydrolysate were methyl trihydroxy silane and hydrogen chloride that may be recyclable. Methyl trihydroxy silane and acidified aluminum prepared superfine methyl aluminum silicate.
Chen Zemin +2 more
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The chemistry of radical ion formation on aluminum silicates
Journal of Colloid and Interface Science, 1968Abstract The current status of the chemistry involved in the single electron transfer, which results in radical ion formation on the surfaces of aluminum silicates, is assessed. The conclusion is reached that in many cases oxygen molecules act as the electron acceptor.
Francis R. Dollish, W.Keith Hall
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Silicate complexes of aluminum(III) in aqueous systems
Coordination Chemistry Reviews, 2001Aluminum(III) forms complexes with aqueous silicic acid in neutral or mildly acidic media, and these species are important in the protection of plant and animal life against aluminum toxicity. In highly alkaline media, surprisingly high concentrations of various aluminosilicate solute species can be achieved at least temporarily, the lifetime of the ...
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Aluminum Silicate System: Experimental Determination of the Triple Point
Science, 1963The kyanite-sillimanite-andalusite triple point exists in the pressure-temperature plane at 8 ± 0.5 kb and 300 ± 50°C. Reactions are accomplished experimentally with a Bridgman opposed-anvil press (with an external furnace), modified to provide shearing of the sample charges. All three equilibrium boundaries are proved by reversed reactions.
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