chemical thermodynamics of neptunium and plutonium - U.S. ...

sol K + ,CO 2−3 , 20 −(2.31±0.40)(b) [66GOR/KLI] (a)(e)NpO 2 (CO 3 ) 4−3 (h)sol 0.2 M K 2 CO 3 20 −(2.81±0.40) (b)sol 1 M K 2 CO 3 20 −(0.85±0.40) (b)sol 5.573 M K 2 CO 3 20 (0.11±0.40)(NH 4 ) 4 NpO 2 (CO 3 ) 3 (s) Å NpO 2 (CO 3 ) 4−3 + 4NH + 4sol 0 M (NH 4 ) 2 CO 3 ? −(3.42±0.40) (b) [71MOS2](a) (g)sol 0.1 M (NH 4 ) 2 CO 3 ? −(3.48±0.40) (b)sol 0.5 M (NH 4 ) 2 CO 3 ? −(2.33±0.40) (b)sol 0.75 M (NH 4 ) 2 CO 3 ? −(1.82±0.40) (b)sol 0.75 M (NH 4 ) 2 CO 3 ? −(1.91±0.40)sol 1 M (NH 4 ) 2 CO 3 ? −(1.43±0.40) (b)sol 1 M (NH 4 ) 2 CO 3 ? −(1.45±0.40)sol 1.25 M (NH 4 ) 2 CO 3 ? −(1.19±0.40) (b)sol 1.25 M (NH 4 ) 2 CO 3 ? −(1.25±0.40)sol 1.5 M (NH 4 ) 2 CO 3 ? −(0.89±0.40) (b)sol 1.8 M (NH 4 ) 2 CO 3 ? −(0.66±0.40) (b)sol 2.20 M (NH 4 ) 2 CO 3 ? −(0.47±0.40) (b)(a) This constant is calculated in the present review (Appendix A) from data given by the author.(b) These data were used to obtain the standard values selected in the present review.(c) Corrected by this review for the dissociation of NpO 2 (CO 3 ) 5−3 into NpO 2 (CO 3 ) 3−(d) 2This value was calculated by the author; who finally decided there was no firm evidence for this particular species.(continued on next page)12.1 Neptunium carbon compounds and complexes 209