An attempt is made to find relations between crystal structure and crystal morphology on an energy basis. After an historical approach to the subject the general principles, outlined by Hartman & Perdok (1952), are treated in greater detail in chapter II. It is concluded that the morphology of a crystal is governed by chains of strong bonds, running through the structure in a limited number of directions. The energetical period of such a chain of strong bonds is called a periodic bond chain vector (P.B.c.vector). ... Zie: Summary
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