In the present paper, the electronic, structural, thermodynamic, and elastic properties of cubic P bGeO 3 perovskite oxide are presented and computed using the WIEN2k code. The structural properties have been evaluated and they are in good agreement with the theoretical and experimental data. A phonon dispersion is made and it reveals that the cubic P bGeO 3 perovskite is dynamically stable. In addition, the electronic properties of P bGeO 3 shows an opening gap energy, meaning a semiconductor behavior with an indirect band gap equal to 1.67 eV . Moreover, the obtained elastic constants of cubic P bGeO 3 satisfy Born's mechanical stability criteria, and this indicates that our compound behaves as a stable ductile material. The temperature-pressure effects on thermodynamic parameters are investigated using the Gibbs2 package. Finally, based on the obtained results about the cubic P bGeO 3 perovskite properties, we assume that this compound will have potential applications.

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