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short communications
Stacking fault densities α and β of the Ag–Pd alloy system were determined from peak shift and peak asymmetry measurements of the X-ray diffraction line profiles recorded by a Geiger counter X-ray diffractometer. The concentration of the fault probabilities was found to be small. From Fourier analysis of line shapes the anisotropic values of the effective particle sizes, [De]hkl and root mean square strains, [〈L2〉]hkl1/2, were obtained in all cases. No appreciable change in [De]hkl and [〈L2〉]hkl1/2 was observed for a wide solid-solution range. The observed particle-size broadening is primarily a consequence of deformation and twin faults and a fair agreement has been observed for the compound fault probability (1.5α + β) obtained from the two different methods.