TO THE CENTENNIAL ANNIVERSARY OF GREAT DISCOVERIES
We are at the edge of the century since the greatest discoveries in the history of natural sciences. The phenomenon of X-ray diffraction on crystals has been revealed in 1912. And, subsequently, the theoretical basement of the X-ray-diffraction method to study the substance has been developed in 1913; it has allowed immediately the deciphering of the first, in the human history, crystal structure. All this contributed to appearance of the concept of atomic structure of the substance, which turns out to be mostly crystalline. Thus, the XX century started - the century of crystals. Displayed below information on the event is complemented by references on outstanding accompanying discoveries.