Ca), the following reagents Mg(NO3)2·6H2O, Zn(NO3)2·6H2O, Sr(NO3)2, and Ce(NO3)3·6H2O (purity: 99.999%, Alpha Aesar, Haverhill, MA, USA) were additionally used, in quantities reported to Ca, by keeping the (Ca+Me)/P molar ratio to 1.667 (the stoichiometric value of HA)....