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short communications
A general expression for the diffracted intensities from an aggregate of cylindrically curved crystallites with rotational shifts of layers by different amounts has been worked out using a model and treatments similar to those of previous work [Ray, De & Bhattacherjee (1978). Acta Cryst. A34, 637-638]. Numerical computations for several cases of layer shift showed that the heights of the diffraction peaks decrease accompanying slight changes in peak positions as the unit of angular shift decreases.