The first experimental observation of an asymorphic regular system

Abstract

The use of X-rays enabled V.L. Bragg (and his father) to get the means that led to conclusions extremely important for the theory of crystal structure. These conclusions are partly unexpected, at least in the sense that it was expected to see the centers of chemical particles at the points of regular systems, while the experiments of the named scientist led to the conclusion that these are the centers of atoms. Thanks to this, in substances of the simplest chemical composition, special regular systems of points are obtained, and the centers of symmetry are occupied by individual atoms, as if the atoms themselves also have high symmetry.