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alpha-SixGe(1-x)O2 example
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Description:
The example generates Table 2 in :
El-Kelany, K. E., Erba, a, Carbonnière, P., & Rérat, M. (2014).
Piezoelectric, elastic, structural and dielectric properties of the Si(1-x)Ge(x)O(2) solid solution: a theoretical study. 
Journal of Physics. Condensed Matter : An Institute of Physics Journal, 26(20), 205401. 
doi:10.1088/0953-8984/26/20/205401

Instructions:
Supercell should be installed. Run script df_cfg.bash

Results:
The table is directly printed in the terminal.

