D. I. Mendeleev’s Yu. Periodic law, G. Shcherbakov’s cosmogeochemical system and prospects for the development of mineralogical and geochemical investigations

The law of cosmogeochemical differentiation discovered by the remarkable Russian geochemist Yu. G. Shcherbakov and the geochemical classification of elements formulated on its basis on the scale of the Periodic system of D. I. Mendeleev are analyzed. Based on new research results, it is shown that signs of the fundamental cosmic distribution code of chemical elements are quite clearly preserved in terrestrial geological and biological objects.