COPRECIPITATION IN SOME BINARY SYSTEMS OF RARE EARTH OXALATES

Journal Article · Wed Oct 01 04:00:00 EDT 1958 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60142a007· OSTI ID:4286366

Feibush, A M; Rowley, K; Gordon, L

On the basis of an equilibrium model, the distribution coefflcient, h, in the Doerner-Hoskine equation should be functionally related to the solubility products of the coprecipitating species. 1n the case of the rare earth oxalates, the coefficient should be equal to the square root of the ratio of the solubility products. The neodymium-cerium, yttrium-cerium, and ytterbiumneodymium systems were studied. These systems obeyed the Doerner- Hoskins relationship in that the distribution coefficient, lambda , was constant over the range 0 to 100% of the host crystal precipitated; when the mole ratio composition of the solid phase of the neodymium-cerium system was varied over a 106 range, lambda also remained constant. However, the equilibrium model does not appear to be valid because there is no correlation between lambda and the solubility product ratio. It appears likely that the value of the distribution coefficient is determined by the kinetics of the precipitation process rather than the solubilities of the substances. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.; Syracuse Univ., N.Y.
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-001139
• OSTI ID: 4286366
• Journal Information: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Journal Name: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed. Vol. Vol: 30; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CERIUM
CHEMISTRY
CRYSTALS
DISTRIBUTION
DOERNER-HOSKINS DISTRIBUTION
EQUATIONS
EQUILIBRIUM
MIXING
NEODYMIUM
OXALATES
PRECIPITATION
QUANTITY RATIO
RARE EARTHS
REACTION KINETICS
SEPARATION PROCESSES
SOLIDS
SOLUBILITY
STABILITY
YTTERBIUM
YTTRIUM