The mechanical stability was evaluated from the elastic constants calculations. The analysis of the elastic tensors was carried out using the ELATE software , which provides the bulk (B), shear (G) and Young's (E) moduli along different averaging methods; the Voigt approach was chosen here. Vickers hardness (H V ) from elastic properties was evaluated using the empirical Mazhnik-Oganov and Chen-Niu models. The hardness was also estimated using the thermodynamic model, which is based on thermodynamic properties and crystal structure , and the Lyakhov-Oganov approach , which considers the topology of the crystal structure, the strength of covalent bonds, the degree of ionicity and directionality. The fracture toughness (K Ic ) was evaluated within the Mazhnik-Oganov model .