Theory of the Effect of Temperature on the Reflection of X-Rays by Crystals. III. High Temperatures. Allotropic Crystals

Abstract

In previous comparisons of the theoretical and experimental temperature effect for the reflection of x-rays, a marked discrepancy was found at high temperatures. It is here shown that this discrepancy disappears when proper account is taken of the variation of the characteristic temperature with temperature. Further, a relationship is found between the temperature factors for two allotropic modifications of the same element.