Some aspects of the X-ray structural characterization of (Ga_1-xAl_xAs)n1(GaAs)n2/GaAs(001) superlattices: erratum

In the paper by Kervarec, Baudet, Caulet, Auvrey, Emery & Regreny [J. Appl. Cryst. (1984). 17, 196-205], an error has been introduced. On page 202, right-hand column, the second paragraph should read: The uneven surfaces of the interfaces can be taken into account by assuming that the SL is made of a juxtaposition of perfect crystallites of the same composition x whose period varies between the extreme values of 2n₁d₁ + 2n₂d₂. In this hypothesis, the experimental diagram is the sum of the X-ray diagrams given by each crystallite; the value of n₁ + n₂ deduced from such a diagram is an average value in the sample zone analyzed, therefore most of the time not integer.