The mechanical stabilities were obtained from the elastic constants' calculations. The treatment of the results was done using ELATE online tool devoted to the analysis of the elastic tensors . The program provides the bulk (B) and shear (G) modules along different averaging methods; the Voigt method was used here. Two methods of microscopic theory of hardness by Tian et al. and Chen et al. were used to estimate the Vickers hardness (H V ) from the elastic constants.