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On the imperfections of crystals

Zwicky, F. (1929) On the imperfections of crystals. Proceedings of the National Academy of Sciences of the United States of America, 15 (3). pp. 253-259. ISSN 0027-8424. http://resolver.caltech.edu/CaltechAUTHORS:ZWIpnas29a

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Abstract

Imperfections of crystals may be either of mechanical or chemical nature. As will appear in the course of this investigation, the phenomena related to the chemical imperfections can hardly be understood without a preliminary knowledge of the mechanical defects of the crystals considered. The aim of the following considerations is to give theoretical reasons for the necessity of microscopic cracks even in the most perfect crystals. It will also be shown how the characteristics of these cracks, such as their size, shape, etc., may in principle be determined from the properties which characterize the atoms or ions which constitute the lattice. The author was led to his conclusions presented here in the course of an attempt to reconcile the discrepancy between the theoretical breaking strength of crystals with the observed values for this quantity. It is proposed therefore to consider this special problem first.


Item Type:Article
Additional Information:© 1929 by the National Academy of Sciences. Communicated February 13, 1929. I am indebted to Dr. A. Goetz of this laboratory for having called my attention to many experimental facts related to the problem under discussion.
Record Number:CaltechAUTHORS:ZWIpnas29a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:ZWIpnas29a
Alternative URL:http://www.pnas.org/cgi/reprint/15/3/253
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8888
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Sep 2007
Last Modified:14 Nov 2014 19:20

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