100 0 001 0 035 2 383 5 39 100 0 01 0 35 1 964 5 39 100 0 05 1 73 1 435 25 200 0 5 0 92 1 526 200 1000 0 5 0 58 1 65______________________________________ monobasic lead sulfate pbo pbso4 and tribasic lead sulfate 3pbo pbso 4 h 2 o were prepared by reacting stoichiometric amounts of pbo and h 2 so 4 pbo was added to water acidified to ph 2 with h 2 so 4 and at 55 u00b0 c and then adding the remaining acid drop wise with stirring the products were dried and the phases confirmed by x ray diffraction ttb was also synthesized by reacting the mono and tri basic lead sulfate 5 gms pb with 0 5m and 0 1 m naoh solution respectively at 85 u00b0 c the solution was titrated to a constant ph of 10 cooling and separation were as described above in all cases the resultant ttb crystals were examined by scanning electron microscopy and their size measured at 2460x magnification fig1 is a plot of the size mean width of the ttb particle synthesized in the presence of varying amounts of sulfate present in the solution during the reaction the size of the ttb decreased as the excess sulfate concentration increased the point marked 10 is the ttb produced with no na 2 so 4 added the points marked 20 were in the presence of excess sulfate added as na 2 so 4 the points marked 30 and 40 are for reaction of 3pbo pbso 4 h 2 o and.