The main purpose of the experiment is to analyze by means of neutron diffraction structural properties and composition of different iron weapons and blades coming from populations of equatorial Africa. Objects are part of the African collection of the Museum of Anthropology and Ethnography in Turin and they are dated to the end of XIX century. The weapons are of particular interest because of their ethnological ritual significance as well as practical. We think to analyze throwing knifes, ritual weapons and surgical instruments to see if there was a level of differentiation of the starting materials according to the different destinations of use. A total of 6 objects will be studied.