Effect of Structure Inhomogeneity of the Surface Lattice on Diamond Morphology

According to W. D. Harkins' theory we calculated the surface energy of some diamond planes as: (100)=9.068 J/m2, (110)=6.412 J/m2, (111)=15.706 J/m2 and b(111)=5.235 J/m2. If the final form of diamond could be accounted for by Gibbe-Wulff's crystal growth taw, the probability of the appearance of {110} planes in the final form of diamond would be much large than that of the {100} planes. But this is in contrast to the actual fact. In this paper we introduce both the sarface energy and the surface structure inhomogeneity free enthalpy Gsti to interpret, from the thermodynamics analyses, why the {110} planes often disappear as the diamond crystal grows. Some related data were calculated by converse inference method.