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A New Analysis of Slater's Compressibility Data

Evjen, H. M. (1933) A New Analysis of Slater's Compressibility Data. Physical Review, 44 (6). pp. 491-500. ISSN 0031-899X. http://resolver.caltech.edu/CaltechAUTHORS:EVJpr33a

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Abstract

The variation of interatomic forces with interatomic distances in crystals may be determined empirically from compressibility data. The experimentally possible range of variation in interatomic distance is, however, so small that the form of the force function valid for extrapolation to much greater distances cannot be adequately determined. From an analysis of Slater's compressibility data for the alkali halides it appears that for them the interionic forces of repulsion may be derived from a common force function. Because of the relatively large variation of lattice constant between the different alkali halides it is possible to determine a form for this common force function which is valid for relatively large variations in interatomic separation. The force function so found differs but little from the inverse power or from the exponential forms for small displacements from the equilibrium position. It drops off more rapidly, however, for increasing distances and increases more rapidly for decreasing distances. The solution given has the interesting property that of all possible force functions compatible with Slater's compressibility data it is the least favorable for the formation of a secondary structure.


Item Type:Article
Additional Information:©1933 The American Physical Society Received 29 November 1932 [H.M.E. was a] National Research Fellow.
Record Number:CaltechAUTHORS:EVJpr33a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:EVJpr33a
Alternative URL:http://dx.doi.org/10.1103/PhysRev.44.491
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5807
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:02 Nov 2006
Last Modified:26 Dec 2012 09:15

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