A study of the impact of the initial reagent’s chemical nature on the mechanochemical synthesis of silver-substituted hydroxyapatite

Samples of hydroxyapatite with the substitution of calcium ions for silver ions were obtained by the mechanochemical method using silver nitrate and silver phosphate substituent ions as sources. The samples were characterised using X-ray diffraction and FTIR spectroscopy. It was observed that the use of AgNO3 resulted in the presence of residual nitrate in the synthesis products. Conversely, the use of Ag3PO4 enabled the obtaining of single-phase silver-substituted carbonate-hydroxyapatite. The introduction of silver cations in the position of calcium cations was found to increase the parameters of the hydroxyapatite crystal lattice.