CARBONATE COMPLEXATION OF THE URANYL(VI) ION

Authors
MEINRATH G KIMURA T
Citation
G. Meinrath et T. Kimura, CARBONATE COMPLEXATION OF THE URANYL(VI) ION, Journal of alloys and compounds, 202, 1993, pp. 89-93
Citations number
26
Categorie Soggetti
Chemistry Physical","Metallurgy & Mining","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
202
Year of publication
1993
Pages
89 - 93
Database
ISI
SICI code
0925-8388(1993)202:<89:CCOTUI>2.0.ZU;2-7
Abstract
The system U(VI)/H2O/CO2 has been investigated by solubility measureme nts in 0.1 M NaClO4 at 25-degrees-C in equilibrium with a CO2 atmosphe re. The formation constants lgbeta(UO2CO3.)=9.23 +/- 0.04, lgbeta(UO2( CO3)22-) = 15.38 +/- 0.17 and lgbeta(UO2(CO3)34-) = 21.86 +/- 0.05 hav e been evaluated. The solid phase was characterized as UO2CO3(S). For this phase a solubility product lgK(sp)(UO2CO3) = - 14.18 +/- 0.03 has been obtained. An upper limit of lgbeta(UO2OH+)<8.6 was determined.