New concept of crystal structure types and crystal- chemical analysis

Abstract

In establishing the structure, we were guided even earlier not by the complete sum of combinations that a given crystal exhibits, but only by a small number of the most important pairs of faces. In this respect, as we see, no change has occurred. Even now, we must first of all note these most important forms, but previously we calculated the density of these forms, since, after all, the sequence of faces by importance was still the basis. Now this calculation is no longer necessary, and the matter is significantly simplified, because it only remains to determine, based on these forms, which of the three belts these forms fall into.

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