A Search for the Source of Dielectric Polarization

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Abstract
A brief discussion is given of the work of Hengstenberg on the same subject. A theory of the distortion of a polar cubic lattice by electric stress is derived with the method suggested by Richardson for calculating electric stress on the ions, and the frequency of residual rays for determining the restraining forces. The effect of the distortion on intensity of x-ray reflection is then calculated in the usual manner. Measurements of change in intensity of reflected x-rays were made with a precision of about 0.1 percent in the 4th and 5th orders for NaCl and the 5th order for KCl using gradients up to 700 kv/cm. It is concluded that the effect is probably not as large as predicted by Hengstenberg, i.e., the polarization is probably not due to motion of the ions as units. The precision of the experiments was not high enough to determine whether the theory derived here is correct.

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