Published 2004
| Version v1
Miscellaneous
Thermochemistry of selected sodium neptunyl carbonates
Creators
- 1. Liege Univ. (Belgium). Coordination and Radiochemistry
Description
The molar enthalpies of dissolution in 1.00 M HCl of well characterized sodium neptunyl carbonates, namely NaNpO2CO3(cr), NaNpO2CO3.H2O(cr), and Na3NpO2(CO3)2.H2O(cr), were measured at 298.15 K. From these measurements, the following standard molar enthalpies of formation ΔfHmo (kJ . mol-1) have been calculated as: NaNpO2CO3(cr), - (1885.4 ± 4.9); NaNpO2CO3.H2O(cr), - (2185.6 ± 5.2); Na3NpO2(CO3)2.H2O(cr), - (3340.5 ± 5.0). In this study, use was made of an improved version of a sealed solution micro-calorimeter described previously. The new calorimetric cell made of 18-carat gold alloy is well suited for redox sensitive solutions such as those of Np(V). (orig.)
Additional details
Publishing Information
- ISBN
- 3-89336-362-9
- Imprint Title
- Advances in nuclear and radiochemistry. Extended abstracts
- Imprint Pagination
- 831 p.
- Journal Volume
- 3
- Series
- Schriften des Forschungszentrums Juelich. Reihe Allgemeines und Interdisziplinaeres
- Journal Page Range
- p. 105-106
- ISSN
- 1433-5565
- Report number
- INIS-DE--0228
Conference
- Title
- 6. international conference on nuclear and radiochemistry
- Acronym
- NRC 6
- Dates
- 29 Aug - 3 Sep 2004
- Place
- Aachen (Germany)
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 38065323
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CALORIMETERS; CARBONATES; CHEMICAL REACTION KINETICS; ENTHALPY; ENTROPY; GOLD; NEPTUNYL COMPOUNDS; SOLUBILITY
- Descriptors DEC
- ACTINIDE COMPOUNDS; CARBON COMPOUNDS; ELEMENTS; KINETICS; MEASURING INSTRUMENTS; METALS; NEPTUNIUM COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REACTION KINETICS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS; TRANSURANIUM COMPOUNDS