By Robert J. Silva
This is often the second one quantity in a chain of severe studies of the chemical thermodynamic information of these components of specific value within the protection evaluation modeling of high-level radioactive waste garage and disposal amenities. the target of those stories is to supply a collection of trustworthy thermodynamic facts that may be used to explain the behaviour of those components less than stipulations suitable for radioactive waste disposal structures and the geochemical environments. the current quantity is a overview of experimental information said within the literature for americium. On a couple of events, the place no facts existed, comparisons and estimates have been made in keeping with experimental information on analog lanthanide parts. the elemental philosophy used to be to boost a minimal set of sturdy levels and resolution species of americium that may healthy all experimental info being reviewed
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Additional info for Chemical Thermodynamics of Americium
3. 3. Only reaction data are selected for this compound, cf. 2. 2: Selected thermodynamic data for reactions involving americium compounds and complexes. All ionic species listed in this table are aqueous species. 1 MPa and, for aqueous species, infinite dilution (1 = 0). The uncer tainties listed below each value represent total uncertainties and correspond in principle to the statistically defined 95% confidence interval. Values obtained from internal calculation, cf. footnote (a), are rounded at the third digit after the decimal point and may therefore not be exactly identical to those given in Chapter V.
2). Most of these values are the CODATA Key Values [89COX/WAG]. T h e selection of the remaining auxiliary d a t a is discussed in Chapter VI of the uranium review [ 9 2 G R E / F U G ] . All the selected d a t a presented in Tables III. 2 are internally consistent. This consistency is maintained by the internal consistency verification and recalculation software developed at the ΝΕΑ D a t a Bank in conjunction with the N E A - T D B d a t a base system, cf. 6. Therefore, when using the selected d a t a for americiurn species, the auxiliary d a t a of Chapter IV must be used together with the d a t a in Chapter III to ensure internal consistency of the d a t a set.
The data presented in this table are available on PC diskettes or other computer media from the OECD Nuclear Energy Agency. 712 + 2 CO? 279 Am (C0 ) (cr) 2 Value calculated internally with the Gibbs-Helmholtz equation, A G^ Value calculated from a selected standard potential. Value of l o g K° calculated internally from A G^. 3: Selected t e m p e r a t u r e coefficients for heat capacities functions for t h e values marked with ( ) in Table I I I . l , according to t h e form c C °, (T) = a + bT + cT 2 p m + eT-\ T h e functions are valid between t h e t e m p e r a t u r e s T and T m i n m a x in parentheses represent t h e power of 10.