Abstract
THE present work, which is an expansion of an essay originally submitted for a prize offered by the philosophical faculty of Gottingen, is a bold and original attempt to grapple with the difficult problem of the chemistry of the silicates and related compounds. The authors have sought to give a structural explanation of the behaviour of such compounds consistent with the doctrine of valency. The “Hexite-Pentite” hypothesis, which forms the basis of the work, assumes that silicates and alumino-silicates are not, in general, derived from the simpler hydroxides, such as Si(OH)4 and Al(OH)3, but from compounds formed by the condensation of six such molecules, with elimination of water, to form a closed ring. Less frequently, five-membered rings may be produced, and complex molecules are built up by the union, according to certain definite principles, of two or more such “hexite” or “pentite” groups. By the replacement of hydroxylic hydrogen by metals, of hydroxyl by fluorine, &c., formula? are constructed which are capable of expressing with remarkable completeness the properties and reactions of many silicates and aluminosilicates.
Die Silicate in chemischer und technischer Beziehung: unter Zugrundelegung der seitens der philosophischen Fakultät der Universität Göttingen preisgekrönten Hexitpentit - Theorie nebst Umwandlung derselben in eine allgemeine stereochemische Theorie.
By Dr. W. Asch Dr. D. Asch. Pp. xv + 409. (Berlin: Julius Springer, 1911.) Price 16 marks.
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DESCH, C. Die Silicate in chemischer und technischer Beziehung: unter Zugrundelegung der seitens der philosophischen Fakultät der Universität Göttingen preisgekrönten Hexitpentit —Theorie nebst Umwandlung derselben in eine allgemeine stereochemische Theorie . Nature 89, 212 (1912). https://doi.org/10.1038/089212a0
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DOI: https://doi.org/10.1038/089212a0