Potassium hydrogen phthalate: Relation between crystal structure and crystal morphology

Using the Periodic Bond Chain analysis of Hartman-Perdok, the morphology of potassium hydrogen phthalate was determined. From this analysis 10 different F faces (hkl) resulted which could be arranged according to their morphological importance resulting from the calculation of the Ising critical temperature of the respective two-dimensional connected nets. A comparison between this morphological order, an ordering based on other criteria and the experimentally observed morphology resulted in some discrepancies. After taking the possibility of surface relaxation into consideration a good correspondence between the results of the PBC analysis and the observed morphology was obtained.