Lester R. Morss is the Program Manager for Heavy Element Chemistry at the Office of Science , U.S. Department of Energy in Germantown, Maryland, USA. He was taught actinide chemistry fbyProfessor Burris B. Cunningham, his Ph.D. mentor at the University of California, Berkeley and from 1971 to 1980 he was a member of the chemistry faculty at Rutgers University, New Brunswick, New Jersey, USA. In 1980, Dr. Morss moved to the Argonne National Laboratory (Illinois, USA), where he remained as an actinide chemist until 2002 . At all of these institutions he carried out research in the inorganic chemistry of lanthanide and actinide elements, with a focus on transuranium elements. His publications were primarily in thermochemistry and structure-bonding relationships among metals, oxides, halides, and coordination complexes. Dr. Morss has had fellowships at the University of Liege, Belgium and at the University of Hannover, Germany (von Humboldt Senior Scientist) and he is also a fellow of the American Association for the Advancement of Science.Norman Edelstein is an emeritus Senior Scientist at the Lawrence Berkeley National Laboratory (LBNL). He started his studies in actinide chemistry with Professor Burris B. Cunningham in 1964 at LBNL (then the University of California Radiation Laboratory), USA. Following Professor Cunningham's untimely death in 1972 he became head of the actinide chemistry group and held that position until his assignment in 2000 and 2001 as temporary Program Manager for Heavy Element Chemistry at the Office of Science, U.S. Department of Energy, Germantown, Maryland, USA. His primary research interests are the optical properties, magnetic properties, and electronic structure of the actinides and lanthanides; the general, inorganic and solution chemistry of the actinides; and synchrotron radiation studies of actinides and other environmentally relevant materials. Dr. Edelstein has published over 200 papers on these and other topics and has edited three other volumes on actinide subjects.Jean Fuger is Professor Emeritus at the University of Liege, Belgium, where he has taught courses in radiochemistry, analytical chemistry, and related subjects. In the early stages of his career, whilst associated with the Inter-University Institute for Nuclear Sciences (Brussels, Belgium), he made extensive stays at the University of California Radiation Laboratory, Berkeley, USA, with Professor Burris B. Cunningham, from whom he learned various microchemical techniques in actinide chemistry, with emphasis on preparative chemistry and microcalorimetry. From 1986 to 1997 he served as head of the chemistry division and later as deputy director of the European Institute for Transuranium Elements, Karlsruhe, Germany. His research interests are centered on the structural and thermodynamic properties of the lanthanides and actinides and their compounds, as well as the solution chemistry of these elements. He published about 125 papers, and 20 monographs and book chapters on these topics.

• 1. Introduction.- 2. Actinium.- 3. Thorium.- 4. Protactinium.- 5. Uranium.- 6. Neptunium.- 7. Plutonium.- 8. Americium.- 9. Curium.- 10. Berkelium.- 11. Californium.- 12. Einsteinium.- 13. Fermium, Mendelevium, Nobelium, and Lawrencium.- 14. Transactinide Elements and Future Elements.- 15. Summary and Comparison of Properties of the Actinide and Transactinide Elements.- 16. Spectra and Electronic Structures of Free Actinide Atoms and Ions.- 17. Theoretical Studies of the Electronic Structure of Compounds of the Actinide Elements.- 18. Optical Spectra and Electronic Structure.- 19. Thermodynamic Properties of Actinides and Actinide Compounds.- 20. Magnetic Properties.- 21. 5f-Electron Phenomena in the Metallic State.- 22. Actinide Structural Chemistry.- 23. Actinides in Solution: Complexation and Kinetics.- 24. Actinide Separation Science and Technology.- 25. Organoactinide Chemistry: Synthesis and Characterization.- 26. Homogeneous and Heterogeneous Catalytic Processes Promoted by Organoactinides.- 27. Identification and Speciation of Actinides in the Environment.- 28. X-ray Absorption Spectroscopy of the Actinides.- 29. Handling, Storage, and Disposition of Plutonium and Uranium.- 30. Trace Analysis of Actinides in Geological, Environmental, and Biological Matrices.- 31. Actinides in Animals and Man.- 32. Actinides in the Geosphere.- 33. Subsurface Interactions of Actinide Species with Microorganisms.- 34. Nuclear Fuels.- 35. Actinide Waste Forms and Radiation Effects.- 36. Analytical Chemistry of Plutonium.- 37. Actinide Chalcogenide Compounds.- 38. Molecular Spectroscopy and Reactions of Actinides in the Gas Phase and Cryogenic Matrices.- 39. Hydrothermal Synthesis and Crystal Structures of Actinide Compounds.

Lester R. Morss is the Program Manager for Heavy Element Chemistry at the Office of Science , U.S. Department of Energy in Germantown, Maryland, USA. He was taught actinide chemistry fbyProfessor Burris B. Cunningham, his Ph.D. mentor at the University of California, Berkeley and from 1971 to 1980 he was a member of the chemistry faculty at Rutgers University, New Brunswick, New Jersey, USA. In 1980, Dr. Morss moved to the Argonne National Laboratory (Illinois, USA), where he remained as an actinide chemist until 2002 . At all of these institutions he carried out research in the inorganic chemistry of lanthanide and actinide elements, with a focus on transuranium elements. His publications were primarily in thermochemistry and structure-bonding relationships among metals, oxides, halides, and coordination complexes. Dr. Morss has had fellowships at the University of Liege, Belgium and at the University of Hannover, Germany (von Humboldt Senior Scientist) and he is also a fellow of the American Association for the Advancement of Science.Norman Edelstein is an emeritus Senior Scientist at the Lawrence Berkeley National Laboratory (LBNL). He started his studies in actinide chemistry with Professor Burris B. Cunningham in 1964 at LBNL (then the University of California Radiation Laboratory), USA. Following Professor Cunningham's untimely death in 1972 he became head of the actinide chemistry group and held that position until his assignment in 2000 and 2001 as temporary Program Manager for Heavy Element Chemistry at the Office of Science, U.S. Department of Energy, Germantown, Maryland, USA. His primary research interests are the optical properties, magnetic properties, and electronic structure of the actinides and lanthanides; the general, inorganic and solution chemistry of the actinides; and synchrotron radiation studies of actinides and other environmentally relevant materials. Dr. Edelstein has published over 200 papers on these and other topics and has edited three other volumes on actinide subjects.Jean Fuger is Professor Emeritus at the University of Liege, Belgium, where he has taught courses in radiochemistry, analytical chemistry, and related subjects. In the early stages of his career, whilst associated with the Inter-University Institute for Nuclear Sciences (Brussels, Belgium), he made extensive stays at the University of California Radiation Laboratory, Berkeley, USA, with Professor Burris B. Cunningham, from whom he learned various microchemical techniques in actinide chemistry, with emphasis on preparative chemistry and microcalorimetry. From 1986 to 1997 he served as head of the chemistry division and later as deputy director of the European Institute for Transuranium Elements, Karlsruhe, Germany. His research interests are centered on the structural and thermodynamic properties of the lanthanides and actinides and their compounds, as well as the solution chemistry of these elements. He published about 125 papers, and 20 monographs and book chapters on these topics.

• 1. Introduction.- 2. Actinium.- 3. Thorium.- 4. Protactinium.- 5. Uranium.- 6. Neptunium.- 7. Plutonium.- 8. Americium.- 9. Curium.- 10. Berkelium.- 11. Californium.- 12. Einsteinium.- 13. Fermium, Mendelevium, Nobelium, and Lawrencium.- 14. Transactinide Elements and Future Elements.- 15. Summary and Comparison of Properties of the Actinide and Transactinide Elements.- 16. Spectra and Electronic Structures of Free Actinide Atoms and Ions.- 17. Theoretical Studies of the Electronic Structure of Compounds of the Actinide Elements.- 18. Optical Spectra and Electronic Structure.- 19. Thermodynamic Properties of Actinides and Actinide Compounds.- 20. Magnetic Properties.- 21. 5f-Electron Phenomena in the Metallic State.- 22. Actinide Structural Chemistry.- 23. Actinides in Solution: Complexation and Kinetics.- 24. Actinide Separation Science and Technology.- 25. Organoactinide Chemistry: Synthesis and Characterization.- 26. Homogeneous and Heterogeneous Catalytic Processes Promoted by Organoactinides.- 27. Identification and Speciation of Actinides in the Environment.- 28. X-ray Absorption Spectroscopy of the Actinides.- 29. Handling, Storage, and Disposition of Plutonium and Uranium.- 30. Trace Analysis of Actinides in Geological, Environmental, and Biological Matrices.- 31. Actinides in Animals and Man.- 32. Actinides in the Geosphere.- 33. Subsurface Interactions of Actinide Species with Microorganisms.- 34. Nuclear Fuels.- 35. Actinide Waste Forms and Radiation Effects.- 36. Analytical Chemistry of Plutonium.- 37. Actinide Chalcogenide Compounds.- 38. Molecular Spectroscopy and Reactions of Actinides in the Gas Phase and Cryogenic Matrices.- 39. Hydrothermal Synthesis and Crystal Structures of Actinide Compounds.