Crystal morphology slice energy

In 1955, Hartman and Perdok (18) refined the BFDH model by relating the crystal morphology to its internal structure on an energy basis. They identified that chains of strong intermolecular bonds known as periodic bond chains (PBC) govern the crystal morphology. According to the number of PBC inside a slice of thickness, they classified the crystal faces as (i) F-faces (flat), two or more PBC, (ii) S-faces (stepped), one PBC, or (iii) K-faces (kinked), zero PBC. 

The morphology of a crystal is determined by the relative rates of growth of different crystal faces as the crystal forms. The surface attachment energy ( att) may be defined for a particular crystal face as the energy released as a growth slice attaches to the surface of a growing crystal, and is related to the lattice energy ( cryst) by the relationship ... 

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