A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is
The dynamical properties of a crystal for small vibrations can be described by the set of coefficients of the potential energy forming the dynamical matrix. The elastic constants and many other observable quantities can be calculated in terms of the elements of the dynamical matrix (but in general not vice versa). The formulae given in previous publications are based on too narrow assumptions (central forces). In the present paper (Part I) this theory is developed in the most general form,doi:10.1098/rspa.1947.0003 fatcat:r5lkgaix3vdhbgnirxd4on562e