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Published May 1, 1950 | public
Journal Article Open

Compressibilities, Force Constants, and Interatomic Distances of the Elements in the Solid State

Abstract

Available data for the compressibilities of crystalline elements are used to calculate the force constants for the assumed Hooke's law interactions between adjacent atoms. On comparison of these constants and the equilibrium interatomic distances it is found that for many substances there holds the relation discovered by Badger for diatomic gas molecules: a linear relation between the reciprocal of the cube root of the force constant and the interatomic distance, for elements of a given row in the periodic table. Deviations from this relation are in the direction of increased compressibility. They are explained as resulting from changes in bond type (that is, in electronic structure) that permit the crystal to adjust itself to the increased pressure.

Additional Information

Copyright © 1950 American Institute of Physics (Received January 23, 1950) The work reported in this paper was carried out with the aid of a grant from the Carbide and Carbon Chemicals Corporation. We wish to thank Professor P. W. Brdgman for communicating his unpublished data to us in 1947. Gates and Crellin Laboratories of Chemistry, Contribution No. 1380

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August 21, 2023
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