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  • Chemistry  (1)
  • Alkali zeolites
  • Tricalciumaluminate
  • 1980-1984
  • 1965-1969  (1)
  • 1960-1964
  • 1969  (1)
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  • 1980-1984
  • 1965-1969  (1)
  • 1960-1964
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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By means of dioxane, trichloracetic acid, and water containing elution solvents it is possible to separate and identify, by paper chromatography, mono-, di-, cyclotri-, cyclotetra-, cyclohexa-, cycloocta-, and poly-silicate anions. Application of this method for solving some problems of silicate chemistry reveals that the condensation of 0.08 m monosilicic acid at pH 2 proceeds via cyclosilicic acids, that on concentrating an “Li2H2SiO4” solution cyclosilicate anions are formed, and that the compound Na2O · 2 CaO · 3 SiO2 is a cyclohexasilicate, Na4Ca4[Si6O18].
    Notes: Es wird gezeigt, daß es unter bestimmten Bedingungen mit Dioxan, Trichloressigsäure und Wasser enthaltenden Elutionsmitteln gelingt, Mono-, Di-, Cyclotri-, Cyclotetra-, Cyclohexa-, Cycloocta- und Polysilicatanionen papierchromatographisch zu trennen und nebeneinander nachzuweisen. Die Anwendung dieser Methode auf einige Probleme der Silicatchemie ergibt, daß die Kondensation der Monokieselsäure bei pH = 2 in 0,08 molarer Lösung über Cyclokieselsäuren läuft, bei Konzentrationserhöhung von „Li2H2SiO4“-Lösungen Cyclosilicate gebildet werden und die Verbindung Na2O · 2 CaO · 3 SiO2 aus Cyclohexasilicatanionen entsprechend Na4Ca4[Si6O18] aufgebaut ist.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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