Surface energies of cubic diamond structure compounds

Surface energies of cubic diamond structure compounds 

The surface energy of dense-packed faces (111) of Si and diamond will be estimated taking as a reference value that for Ge at its melting point and applying the expression (1.15) of tsv established in the framework of the simple broken bond model of Skapski. As a first approximation, the effect of temperature on crSv will be neglected. 

According to expression (1.15), rSv is proportional to the sublimation energy Ls of the crystal. The atomic area to can be calculated from the molar volume vm as follows  

Although a rigorous evaluation of the uncertainty on the estimated values of o-sv for Si and diamond cannot be made, it is expected to be less than 50%. 

Hultgren, R., Desai, P. D., Hawkins, D. T., Gleiser, M., Kelley, K. K. and Wagman, D. D. (1973) Selected Values of the Thermodynamic Properties of the Elements, American Society for Metals, Metals Park, Ohio 44073 

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