Die Kolloidchemie als Hilfswissenschaft der Mineralogie und Lagerstättenlehre und ihre Anwendung auf die metasomatischen Blei-Zink-Lagerstätten

Abstract

THE original object of this small work, as stated in the preface, was to inquire what part colloidal processes, and more particularly gel formation, played in meta-somatosis. Although the conception that many minerals were gels had been systematically developed by Cornu, and had been adopted by Doelter and his collaborators, the author states that he could not find anywhere a synopsis of the properties of mineral gels, and therefore devotes the first part of the book to a description of their characteristics and to the methods of diagnosis. The definition of a simple gel prepared in vitro is not easy, and does not become more so in the case of systems which may have undergone secondary transformations like re-crystallisation, so that diagnosis must rest on the simultaneous occurrence of a number of criteria. Due attention is given to a number of secondary phenomena, like fissures due to shrinkage, accidental double refraction, the influence of gels on crystal habitus, etc., which cumulatively point to a mineral having at some time passed through a gel stage.

Die Kolloidchemie als Hilfswissenschaft der Mineralogie und Lagerstättenlehre und ihre Anwendung auf die metasomatischen Blei-Zink-Lagerstätten.

Von Dr. F. Bernauer. Pp. viii + 83. (Berlin: Gebrüder Borntraeger, 1924.) 5s.