CODATA thermodynamic compilations

Table 17.14 represents a listing of all actinide compounds and other species for which measured or estimated thermodynamic properties are available. The sequence of species is by actinide element, with subordinate elements following the US National Bureau of Standards standard order of arrangement. Original literature references have been cited, unless there is an authoritative review or assessment. Error limits are given wherever possible. This tabulation attempts to be self-consistent with the CODATA [128] thermodynamic compilations, and in general accepts IAEA assessments [14-21], which are consistent with CODATA-IUPAC selected data. In many cases for thorium and uranium compounds the NBS [12] tabulations were accepted it should be pointed out that the NBS compilation is self-consistent but not always contemporary and not in exact agreement with CODATA key values. Estimated values of thermodynamic properties are shown in parentheses. 

Finally, reference will be made to a source of names of organizations that make compilations. The CODATA International Compendium of Numerical Data Projects does not contain scientific data but lists organizations that make compilations, gives factual information on the substances covered, states the aims of the compilers, and gives names and prices of publications. Many subjects are covered, including thermodynamics. 

It is regrettable that, in the past, different symbols have been adopted in compilations, but it is expected that, in the future, symbols advocated by I UP AC will be employed universally and that SI will be used for the units. To secure a further unification in thermodynamic tables, the International Council of Scientific Unions (ICSU) and the Committee on Data for Science and Technology (CODATA) set up in 1968 a Task Group on Key Values for Thermodynamics. The first objective of the Task Group is to prepare a set of values of the basic thermodynamic properties of a number of chemical species, to be agreed internationally. The set is to include the elements in both standard and monatomic gaseous states, aqueous ions, and simple compounds. ... 

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