Аннотация:The paper reports the results of a Mossbauer-effect investigation of the Fe57
nuclei in the
NiFe2_xCrx04 ferrites in a wide range of variation of the composition at temperatures above the
magnetic-transition point. The results of x-ray structural studies of the same ferrites are also
presented. On the basis of the obtained data, a number of conclusions are drawn about the
distinctive features of the electron configuration of the iron ions and the nature of their immediate
surroundings.