The effect of F- ions on the electrical properties of poorly crystallized apatite.

Poorly crystallized apatite was prepared by co-precipitation at room temper ature and then treated in an F- rich medium. Characterization by X-ray diff raction and infrared spectroscopy indicated that this treatment did not aff ect the apatitic structure. However, improvements in crystallinity and ioni c conductivity were observed following this treatment. The conductivity spe ctra showed a restructuration of the apatite and a restoration of the order . The implications on the ionic conductivity of dental caries are discussed .