Iron meteorites consist overwhelmingly of nickel-iron alloys. The metal taken from these meteorites is known as meteoric iron and was one of the earliest sources of usable iron available to humans. The overwhelming bulk of these meteorites consists of the Fe,Ni-alloys kamacite [α-(Fe,Ni); Fe0+0.9Ni0.1] and taenite [γ-(Ni,Fe)]. Minor minerals, when occurring, often form rounded nodules of troilite (FeS) or graphite, surrounded by schreibersite [(Fe,Ni)3P] and cohenite [(Fe, Ni, Co)3C]. We intend to propose in our approach a combination of multiphase analysis and elemental analysis of the bulk of the samples through neutron diffraction and NRCA respectively. In this way a quantitative determination of the phase distribution and of the isotopes of the contained elements will be possible aiming to obtain a reliable average composition of the samples.