SnHPO 4 from the Reaction of Stannous Fluoride and Hydroxyapatite at a Low pH

Abstract
The reaction of stannous fluoride with hydroxyapatite at pH values less than 2 was studied. The X-ray diffraction powder pattern indicates that the major product is SnHPO 4. Chemical analysis corroborated this finding and also indicated a minor amount of calcium and fluoride. SnHP04 was synthesized and its X-ray pattern was compared with the reaction product.