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  • Chemistry  (1)
  • clay in prehistory  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Hyperfine interactions 117 (1998), S. 323-335 
    ISSN: 1572-9540
    Keywords: archaeometry ; early ceramics ; clay in prehistory ; Mössbauer spectroscopy ; impure clays ; firing of clays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Early techniques of making pottery can be investigated by 57Fe Mössbauer spectroscopy. Iron is generally present in unpurified clays in concentrations of several percent. During firing, the iron undergoes characteristic changes of its chemical and physical state, depending on the kiln atmosphere and on the maximum firing temperature reached. These changes can be followed by Mössbauer spectroscopy. Firing techniques can often be reconstructed when spectra of laboratory and field fired samples are compared with those observed in ancient sherds.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 377 (1970), S. 100-104 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations on the activated condensation of thermally activated vapour molecules of arsenolite and claudetite on characteristic crystal faces are described. By the experiments it was to be found out wether the activated vapour molecules regularly continue the structure of the given crystal lattice, or grow irregularly like on glass. A claudetite crystal served as support for condensation while arsenolite or claudetite were the solid phases for the evaporation of the molecules to be activated. Though the experimental conditions were varied in a number of different manners in no case a continuing of the crystal structure of the support was observed. The results are discussed.
    Notes: Es werden Untersuchungen über die erzwungene Kondensation von thermisch aktivierten Arsenolith- bzw. Claudetitdampfmolekeln auf arteigener Unterlage beschrieben. Mit Hilfe der Experimente sollte geprüft werden, ob die aktivierten Dampfpartikeln bei Kondensation auf einem vorgegebenen Gitter dieses gesetzmäßig weiterbauen oder regellos, wie auf Glas, aufwachsen. Als Kondensationsunterlage diente ein Claudetitkristall und als Bodenkörper für die zu aktivierenden Dampfteilchen entweder Arsenolith oder Claudetit. Trotz vielfältiger Variation der Versuchsbedingungen konnte in keinem Fall ein Weiterbau des vorgegebenen Gitters beobachtet werden. Die Ergebnisse werden diskutiert.
    Type of Medium: Electronic Resource
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