in water addn. of Na-citrate-soln. to hot Pb(NO3)2-soln.;;

in water react. of aq. soln. of citric acid and Pb(CH3CO2)2 (molar ratio 1:1.5) in coldness, then heating for several hours on water bath in mother lye (closed vessel);; pptn., washing with concd. acetic acid, then with H2O;;

in neat (no solvent) heating above 120°C;;

T=450°C; 2 h; Inert atmosphereCalcination; Temperature;

T=450°C; 2 h; Calcination; Temperature;