Synthesis of various types of inorganic materials, namely metals, ternary metal oxides (ferrites), cadmium sulfide (doped with Mn) and alkaline trifluoromanganates, in their nanocrystalline state is performed in aqueous solutions. Restricting conditions for crystal growth were provided using reverse micelle water-in-oil microemulsions technique. The obtained materials have been characterized using electron microscopy TEM imaging, X-ray diffractometry and SQUID magnetometry.