Powder X-ray diffraction patterns and infra-red absorption spectra were obtained for this system, which crystallized in the anionic-deficient apatite structure. The admixture of Na and K in the structure increased the ionic conductivity, as compared with that of the pure Na or K phases.

Cationic Conductivity and Structural Studies in the Pb8(K,Na)2(PO4)6 System. A.Laghzizil, P.Barboux, A.Bouhaouss: Solid State Ionics, 2000, 128[1-4], 177-81