FLNR Scientific Seminar 27 January 2015, 15:30, FLNR Conference hall   Shchegolev V.A. “Cluster structure in stable isotope map” Abstract A new stable isotope systematics is presented as association of clusters having a symmetrical structure. The basis of the clusters are the isotopes with odd atomic number Z and an even number of neutrons N, belonging to the chemical elements and having one or two isotopes in its composition. The synthesis of these isotopes in the process of stellar nucleosynthesis is possible in the radiative capture _ZA^N(He⁴,γ)_Z+2(A+4)^N+2 and _ZA^N(He⁶,γ)_Z+2(A+6)^N+4. This allows to sequentially accumulate neutrons in the nuclei formed. This approach creates the preconditions for the revision of regulations defining the abundance of chemical elements.