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

44 3. Selected neptunium dataTable 3.1: (continued)Compound f G ◦ m f Hm ◦ Sm ◦ Cp,m◦(kJ · mol −1 ) (kJ · mol −1 ) (J · K −1 · mol −1 ) (J · K −1 · mol −1 )NpN(cr) −270.043 (a) −294.600 63.900 48.700 (c)±5.026 ±5.000 ±1.500 ±0.900NpNO 3+3 −613.413 (b)±5.667NpO 2 (NO 3 ) 2·6H 2 O(s) −2428.069 (a) −3008.241 516.306±5.565 ±5.022 ±8.000NpO 2 HPO 4 (aq)−1927.314 (b)±7.067NpO 2 HPO − 4−2020.589 (b)±5.870NpO 2 H 2 PO + 4−1952.042 (b)±6.491NpO 2 (HPO 4 ) 2−2 −3042.135 (b)±8.598NpC 0.91 (cr) −76.024 (a) −71.100 72.200 50.000 (c)±10.028 ±10.000 ±2.400 ±1.000Np 2 C 3 (cr) −192.427 −187.400 135.000 110.000±19.436 ±19.200 ±10.000 ±8.000NpO 2 CO 3 (aq)−1377.040 (b)±6.617NpO 2 CO 3 (s)−1407.156 (b)±6.233NpO 2 CO − 3−1463.988 (b)±5.652NpO 2 (CO 3 ) 2−2 −1946.015 (b)±7.033NpO 2 (CO 3 ) 3−2−2000.861 (b)±5.685Np(CO 3 ) 3−3−2185.949 (b)±15.451NpO 2 (CO 3 ) 4−3 −2490.208 (b) −2928.323 −12.070±5.759 ±6.254 ±17.917NpO 2 (CO 3 ) 5−3 −2522.859 (b) −3017.120 −135.050±5.733 ±6.893 ±20.467Np(CO 3 ) 4−4 −2812.775 (b)±8.240Np(CO 3 ) 6−5 −3334.567 (b)±8.425(NpO 2 ) 3 (CO 3 ) 6−6 −5839.709 (b)±19.185NpO 2 (CO 3 ) 2 OH 4−−2170.417 (b)(NpO 2 ) 2 CO 3 (OH) − 3±8.785−2814.914 (b)±14.665(Continued on next page)