Citation: Ma. Mercy et al., GIBBS ENERGIES OF FORMATION FOR HYDROCERUSSITE [PB(OH)(2)CENTER-DOT(PBCO3)(2)(S)] AND HYDROZINCITE ([ZN(OH)(2)](3)CENTER-DOT(ZNCO3)(2)(S)) AT 298 K AND 1-BAR FROM ELECTROCHEMICAL-CELL MEASUREMENTS, The American mineralogist, 83(7-8), 1998, pp. 739-745