I have a query regarding how much gram to be taken when one include doping into the system to maintain the stoichiometry by co-precipitation method. My initial precursors are calcium nitrate tetra hydrate, di-ammonium hydrogen phosphate and Ferric nitrate. For pure apatite, I know that Ca/P ratio must be 1.67, so basically I make them both at 0.5 M in say 100 ml water, but then I add only 60 ml di-ammonium hydrogen phosphate to maintain the stoichiometry. Now when I include doping precursor too, now how do I maintain the ratio now of (Ca+Fe)/P to be 1.67 still. Like for 1% (at%) of Fe precursor to be doped, what molar solution should I make it and same for Calcium too, like do i have to make both at same molar i.e. 0.5 M to maintain the ratio as 1.67? And then how much amount should one take both of them to maintain the ratio as 1.67?
Hi Anshul Sharma
Mix the metal salts according to the ratio as you have planed. For example, if you want to make ABxC1-xO3 (x= 0, 0.5, 0.7) then for 0.5 composition you have to mix A:B:C= 1:0.5:0.5. The ration may in molar or milimolar times.
Regards
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