Description Unlike earlier books in this series, this review describes the selection of chemical thermodynamic data for species of two elements, neptunium
and plutonium. Although this came about more by circumstance than design, it has allowed for a more consistent approach to chemical interpretation
than might have occurred in two separate treatments. It has also drawn attention to cases where the available data do not show expected
parallels, and where further work may be useful to confirm or refute apparent differences in the behaviour of neptunium and plutonium.