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In the present paper, the electronic, structural, thermodynamic, and elasticproperties of cubic $PbGeO_{3}$ perovskite oxide are presented and computedusing the WIEN2K code. The structural properties have been evaluated and theyare in good agreement with the theoretical and experimental data. A phonondispersion is made and it reveals that the cubic $PbGeO_{3}$ perovskite isdynamically stable. In addition, the electronic properties of $PbGeO_{3}$ showsan opening gap energy, meaning a semiconductor behavior with an indirect bandgap equal to $1.67 eV$. Moreover, the obtained elastic constants of cubic$PbGeO_{3}$ satisfy Born's mechanical stability criteria, and this indicatesthat our compound behaves as a stable ductile material. Thetemperature-pressure effects on thermodynamic parameters are investigated usingthe Gibbs$2$ package. Finally, based on the obtained results about the cubic$PbGeO_{3}$ perovskite properties, we assume that this compound will havepotential applications.

Enhancement in physical properties of Pb-Based Perovskite Oxides ($PbGeO_{3}$): Ab initio Calculation