calculation from literature values with standard SSA and SSD at ionic strength of 1M, log K for pHzpc 8.4-8.6 in brackets for pHzpc 9-9.5 »Fe-O<1-> + Li<1+> = »Fe-O-Li logK = 3.8 (3.0) »Fe-OH = »Fe-O<1-> + H<1+> pK2 = -logK = 12.3 sum »Fe-OH + Li<1+> = »Fe-O-Li + H<1+> logK=3.8(3.0)-12.3 = -8.5(-9.3)