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

KNpO 2 CO 3·xH 2 O(s) + 2CO 3Å K + NpO 2 (CO 3 ) 3+ xH 2 O(l)sol 0.2 M K 2 CO 3 (20 ±2) −(3.0±1.5) [66GOR/ZEN] (a)(b)sol 1 M KCl 75 −(2±0.63) [93LEM/BOY] (c)(b)CsNpO 2 CO 3·xH 2 O(s) + 2CO 2−3Å Cs + + NpO 2 (CO 3 ) 5−3+ xH 2 O(l)sol 0.2 M Cs 2 CO 3 (20 ±2) −(2.4±1.5) [66GOR/ZEN] (a)(b)NH 4 NpO 2 CO 3 (s) + 2CO 2−3Å NH + 4 + NpO 2(CO 3 ) 5−3+ xH 2 O(l)sol 0.6 M (NH 4 ) 2 CO 3 ? −(2.81±0.4) [71MOS2] (b)(m)Na 3 NpO 2 (CO 3 ) 2·yH 2 O(s) + CO 2−3Å 3Na + + NpO 2 (CO 3 ) 5−3+ yH 2 O(l)sol 0.5 M NaClO 4 75 −(4.70±0.3) [93LEM/BOY] (c)(b)(n)sol 1 M NaClO 4 30 −(4.5±0.2)(Continued on next page)12. Neptunium group 14 compounds and complexes(m) Reinterpreted by this review, the author(s) proposed another interpretation of their data; but it was not correct.(n) The Na 3 NpO 2 (CO 3 ) 2 (s) solid hydrated phase prepared at room temperature is expected to be partially dehydrated when the temperature is raised above 30 ◦ C. Thisstability constant is for this partially dehydrated solid phase.