Dataset of surface reactions for gwb programs Dataset format: dec99 Surface type: Pb-Fr Model type: freundlich Surface potential: n/a Surface capacitance: n/a 1 surface species >Pb++ charge= 2 mole wt.= 207.2000 g 1 species in reaction 1.000 Pb++ Kf= 9.5e-6 nf= .700 -end- * The Kf value is in units of mol/g solid.