Absorption correction for back reflexions in plate‐shaped crystals of high absorption

A simple expression for the absorption correction, derived for an infinite plate intercepting the whole beam, has been shown to be applicable in the structure analysis of plate-shaped hexagonal polytypes of high absorption coefficient. The expression holds almost exactly for crystals which have even a slightly bigger cross section than the X-ray beam, while for crystals completely bathed in X-rays the expression, with slight modification, holds approximately.