By modifying existing precipitation methods, apatite samples were prepared at 800C and were characterized by using X-ray diffraction, infra-red, nuclear magnetic resonance, scanning electron microscopy and chemical analysis. By comparing the effect of fluoride and hydroxide ions upon ionic conductivity measurements, it was concluded that the fluorinated materials were better conductors than were hydroxyapatites. The F- and H+ ions were the main charge carriers, in fluoroapatite and hydroxyapatite compounds, respectively. The most marked effect upon conduction was observed in the case of the Pb apatite.

Comparison of Electrical Properties between Fluoroapatite and Hydroxyapatite Materials. A.Laghzizil, N.E.Herch, A.Bouhaouss, G.Lorente, I.Macquetet: Journal of Solid State Chemistry, 2001, 156[1], 57-60