Solubility of (UO2)3(PO4)2.4H2O in H+-Na+-OH--H2PO-4-HPO2-4-PO3-4-H2O and its comparison to the analogous PuO2+2 system

ABSTRACT-The objectives of this study were to address uncertainties in the solubility product of (UO₂)₃(PO₄)₂ · 4H₂O(c) and in the phosphate complexes of U(VI), and more importantly to develop needed thermodynamic data for the Pu(VI)-phosphate system in order to ascertain the extent to which U(VI) a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of solution chemistry 2005-04, Vol.34 (4), p.469-498
Main Authors: RAI, Dhanpat, YUANXIAN XIA, LINFENG RAO, HESS, Nancy J, FELMY, Andrew R, MOORE, Dean A, MCCREADY, David E
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
HYDRATES
PH VALUE
PLUTONIUM PHOSPHATES
RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
SOLUBILITY
Solutions
THERMODYNAMICS
URANYL PHOSPHATES
X-RAY DIFFRACTION
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:ABSTRACT-The objectives of this study were to address uncertainties in the solubility product of (UO₂)₃(PO₄)₂ · 4H₂O(c) and in the phosphate complexes of U(VI), and more importantly to develop needed thermodynamic data for the Pu(VI)-phosphate system in order to ascertain the extent to which U(VI) and Pu(VI) behave in an analogous fashion. Thus studies were conducted on (UO₂)₃(PO₄)₂ · 4H₂O(c) and (PuO₂)₃(PO₄)₂ · 4H₂O(lc) solubilities for long equilibration periods (up to 870 days) in a wide range of pH values (2.5 to 10.5) at fixed phosphate concentrations of 0.001 and 0.01 M, and in a range of phosphate concentrations (0.0001 to 1.0 M) at fixed pH values of about 3.5. A combination of techniques (XRD, DTA/TG, XAS, and thermodynamic analyses) was used to characterize the reaction products...
ISSN:0095-9782
1572-8927
DOI:10.1007/s10953-005-5216-4