Basic Energy Sciences , Division o f Engineering, Mathematical and Geosciences, o f the U. S. Department o f Energy, under Contract No. W-7405-ENG-48. L i s t o f Tables and Figures Acknowledgment Objective and Scope o f Technical Databook

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Tables of consistent thermodynamic property values for nuclear waste isolation are given. The tables include critically assessed values for Gibbs energy of formation.enthalpy of formation, entropy and heat capacity for minerals; solids; aqueous ions; ion pairs and complex ions of selected actinide and fission decay products at 25OC and zero ionic snength. These inninsic data are used LO calculate equilibrium constants and standard potentials which are compared with typical expenmental measurements and other work. Recommendations for ad& tional research are given.