Hydroxyapatite/fluoropatite solid solutions were prepared by two different methods using Indian coast corals. In the ‘low temperature method’ a known volume (50%) of hydrofluoric acid was added to the coral and an exchange reaction with diammonium phosphate was carried out to form apatite at 250°C under hydrothermal conditions. The coralline derived hydroxyapatite by the above method was reacted with 50 mol% sodium fluoride at 900°C in the ‘high temperature method’. The X-ray powder diffraction, infrared spectroscopy and thermal analysis techniques were employed to characterize the fluorination of the hydroxyapatite.In vitro solubility study in phosphate buffer solution of pH 7·2 indicate the stability of the apatites. The low temperature method of fluorination seems to be advantageous due to betterin vitro stability and absence of impurity phases.
Volume 44, 2021
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
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