475. The solubility of plutonium trifluoride, plutonium tetrafluoride, and plutonium(IV) oxalate in nitric acid mixtures

Mandleberg, C.J.; Francis, K.E.; Smith, Robert P.

doi:10.1039/jr9610002464

Cited by 14 publications

(10 citation statements)

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“…4 There is general agreement among the published data in that the solubility of UO 2 CO 3 is at its minimum, and constant, at approximately 10 Ϫ8.3 -10 Ϫ7.0 mol dm Ϫ3 equilibrium carbonate ion concentration. 5,6,9 Within this The data obtained for ionic strength of 0.1 mol dm Ϫ3 are generally in good agreement but some uncertainty still persists even though high precision solubility measurements, conducted as pH titrations, have been used in the more recent studies. [3][4][5][6][7][8] In these measurements, equilibration time of several weeks up to 6 months was used to ensure attainment of steady state at pHϽ6.5 where the equilibrium solid phase is UO 2 CO 3 , the solid phases were characterized continuously during the experiments, and high-precision procedures for pH measurement were used.…”

Section: Thorium 8-hydroxyquinolinatementioning

confidence: 68%

“…[1][2][3][5][6][7]9 reported numerical data while others 8,10 published their data in graphical form or reported the solubility product of UO 2 CO 3 only. 4 There is general agreement among the published data in that the solubility of UO 2 CO 3 is at its minimum, and constant, at approximately 10 Ϫ8.3 -10 Ϫ7.0 mol dm Ϫ3 equilibrium carbonate ion concentration.…”

Section: Thorium 8-hydroxyquinolinatementioning

confidence: 99%

“…This hydrate was first reported by Volkov et al,8 and since then reconfirmed as the equilibrium solid phase in the solubility studies by several authors. 2,5,9 ͓7732-18-5͔ K. Ueno and A. Saito,Radiochem. Radioanal.…”

Section: Source and Purity Of Materialsmentioning

confidence: 99%

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IUPAC-NIST Solubility Data Series. 74. Actinide Carbon Compounds

Hála¹,

Navratil²

2001

Journal of Physical and Chemical Reference Data

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This volume presents solubility data of the carbonates, salts of carboxylic acids, and other carbon containing compounds of actinides. Covered are compounds of thorium, uranium, neptunium, plutonium, americium, and one system for curium. No solubility data on carbonates or other carbon containing compounds have been found for other actinide elements. The literature has been covered up to the end of 1999, and there was a great effort to have the literature survey as complete as possible. Only those published results that report meaningful data were considered for the volume. Papers that reported qualitative results with statements like ''sparingly soluble'' or ''insoluble,'' etc. were not considered. In addition to papers that published numerical data, some papers that presented data in graphical form only were considered as well.

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Section: Thorium 8-hydroxyquinolinatementioning

confidence: 68%

Section: Thorium 8-hydroxyquinolinatementioning

confidence: 99%

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IUPAC-NIST Solubility Data Series. 74. Actinide Carbon Compounds

Hála¹,

Navratil²

2001

Journal of Physical and Chemical Reference Data

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“…The solubility of the uranyl oxalate (UO 2 C 2 O 4 •3H 2 O) is about 100 times higher than that of Pu(IV) oxalate [Pu(C 2 O 4 ) 2 •6H 2 O]. For example, at 2 M HNO 3 , the uranium concentration above a uranyl oxalate precipitate is ~11 g/L (based on Chernyaev 1966), while the plutonium concentration above a Pu(IV) oxalate precipitate is 0.128 g/L (Mandleberg et al 1961). The solubilities are compared in Figure 2.…”

Section: Precipitation Process Chemistrymentioning

confidence: 99%

Critical Mass Laboratory Solutions Precipitation, Calcination, and Moisture Uptake Investigations

Delegard¹,

Sinkov²,

McNamara³

et al. 2002

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and dry, calcine, and package the resulting filtercake. The objective of the processing was to generate a stable plutonium oxide-bearing powder [as judged by loss-on-ignition (LOI) measurements] that can pass the DOE-STD-3013 moisture criterion (<0.5 wt% LOI) when produced in the ambient humidity of the remote mechanical C (RMC) line in the PFP. Based on these studies with simulated and genuine CML solutions and various constituent materials, process conditions were recommended under which the product powders can reasonably be expected to pass the moisture criterion when packaged in the RMC line at relative humidity up to 80%. (a) Furthermore, LOI could monitor product oxide moisture. The CML solutions are mixtures, in various ratios, of plutonium nitrate and uranium nitrate (of natural and depleted enrichment) in 2-3 M nitric acid with small concentrations of gadolinium nitrate (0.54 g Gd/L) and boric acid (1.66 g B/L). About half of the total plutonium was present in solution streams in which the uranium concentration was over twice that of the plutonium (Table S.1). Therefore, experimentation focused on these more uranium-rich compositions.

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“…Pu2(C204)3 (10,11,71) Pu(C204)2'6H20 (12,13,14,71) (NH,),Pu(C20,)s nH^O (15) B. PuH(C20J/9H20 (9) Na4Pu(C204)4-5H20 (15) K,Pu(C204)4'4H20 (15) Decomposes in hot water and in HNO3 containing NaF.…”

Section: Carbon Containing Compounds Of Plutoniummentioning

confidence: 99%