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Fig. 1
Chemical distribution of cobalt ionic species in aqueous media as a function of pH.
Fig. 2
XRD patterns of synthesized alkaline-earth hydroxyapatite powders prepared via chemical precipitation method followed by calcination at 1,100°C: (A) Ba-HAp, (B) Sr-HAp, and (C) Ca-HAp. Ba-HAp, barium hydroxyapatite; Ca-HAp, calcium hydroxyapatite; Sr-HAp, strontium hydroxyapatite.