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X-ray amorphous powder was synthesized from a water solution of calcium acetate and a mixed-anionic HPO42−/CO32− $$ \left({\mathrm{HPO}}_4^{2-}/{\mathrm{CO}}_3^{2-}\right) $$ water solution, including ammonium hydrophosphate and ammonium carbonate, at room temperature without pH regulation. The powders synthesized from the mixed-anionic HPO42−/CO32− $$ \left({\mathrm{HPO}}_4^{2-}/{\mathrm{CO}}_3^{2-}\right)...
Calcium phosphate powder was synthesized from calcium formiate Ca(CHO2)2 and ammonium hydrophosphate (NH4)2 HPO4 with Ca/P ratio in the initial water solutions equal to 1. The phase composition of the powders synthesized from 0.5M solutions was represented by brushite CaHPO4 · 2H2O and octacalcium phosphate Ca8(HPO4)2 (PO4)6 · 6H2O. After firing at 1100°C the phase composition of the powder was represented...
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