Fig. 6c, d and e indicated that adsorption retarded the transformation of CaF2 to FHAp and led to the mixture of the two instant precipitates, therefore, the pH value should be controlled in the basic range. But at pH>9, the dissolution of
Fig. 6c, d and e indicated that adsorption retarded thetransformation of CaF2 to FHAp and led to the mixture of thetwo instant precipitates, therefore, the pH value should becontrolled in the basic range. But at pH>9, the dissolution of