On the mechanism of strontium incorporation into calcium phosphates
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The results of coprecipitation and sorption of strontium by amorphous and crystalline hydroxyapatite are presented. Coprecipitation experiments, performed over a wide range of experimental conditions, have confirmed that strontium is incorporated into hydroxyapatite by the isomorphous substitution of calcium. Adsorption on the surface of well crystallized hydroxyapatite follows a Langmuir adsorption isotherm with a monolayer capacity of 1.5x10(-4) mol g(-1).