Na-doping approach for conductivity enhancement of natural phosphate derived fluorapatitesIkrame Es-saidi, Jihane Labrag, Abdelaziz Laghzizil, Karim Dânoun, Jean-Michel Nunzi and Mohamed ZahouilyEur. Phys. J. Appl. Phys., 97 (2022) 58DOI: https://doi.org/10.1051/epjap/2022220156