Аннотация:X-ray diffraction studies of single-phase alloy sample Pd-25.5at.%Ni were carried out after its saturation with hydrogen (80mA/cm2, 0.5h) during 500 hours of relaxation. It has been found that there were powerful defective complexes of D-M type in the initial state of the sample, which created therein elastic stresses of compression along the surface of the sample