Irregularity in the distribution of crystallization ability and isomorphism

Abstract

The basis of the modern concept of legality in the formation of facets is the provision on the agreement of the order of importance of facets (manifested both in particular in their appearance and in their magnitude) with the order of their reticular density. This is supposed to be derived from experience as a statistical law, that is, not as an exact law that has always and unconditionally manifested itself, but as legality, which manifests itself in a significant majority of cases. The exceptions that we generally find in experience by no means exclude the idea of the absolute value of the order of the density of faces but they indicate that the formation of faces, in addition to this absolute factor, is influenced by others, the value of which cannot yet be expressed numerically; and these factors can be quite numerous, since the degree of education various external, partly difficult-to-detect conditions also affect one or the other facets.