Clustering of magnetic ions in diluted solid paramagnets

A method for studying the magnetic ion cluster forming in magnetically diluted solid paramagnets is proposed based on experimental data on the concentration dependence of the EPR line form and width. As a concrete example, the distribution of the Mn2+ ions in the Mn2+: MgO solid solution is considered. Some questions of the EPR concentration dependence in the case of the homogeneous random distribution of the magnetic ions is discussed, too. [Russian Text Ignored].