COPRECIPITATION OF RARE EARTH IODATES WITH THORIUM IODATE PRECIPITATED FROM HOMOGENEOUS SOLUTION

Journal Article · Sat Dec 01 04:00:00 EST 1956 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60120a059· OSTI ID:4314817

Shaver, K J

The separation of thorium from rare earths by precipitation of thorium iodate from homogeneous solution is evaluated. The extent of coprecipitation is given when thorium is precipitated in the presence of the rare earths lanthanum, praseodymium, promethium, and europium, and the related elements, yttrium and scandium. The extent of coprecipitation is determined by the use of radioactive tracers of these elements. The distribution of rare earths with thorium follows the logarithmic or heterogeneous distribution law. It is concluded that trivalent rare earths coprecipitate with thorium iodate by a type oi isomorphous replacement wiyhin the thorium iodate lattice. A correlation is given between ionic radii and extent of coprecipitation. (auth)

• Research Organization: Monsanto Chemical Co., Miamisburg, Ohio
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-015423
• OSTI ID: 4314817
• 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: 28; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
CONFIGURATION
DISTRIBUTION
EUROPIUM COMPOUNDS
EUROPIUM ISOTOPES
IODATES
IONS
ISOMORPHISM
LANTHANUM COMPOUNDS
LANTHANUM ISOTOPES
LATTICES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM ISOTOPES
PRECIPITATION
PROMETHIUM COMPOUNDS
PROMETHIUM ISOTOPES
QUANTITATIVE ANALYSIS
RADIOISOTOPES
RARE EARTHS
SCANDIUM COMPOUNDS
SCANDIUM ISOTOPES
SEPARATION PROCESSES
SOLUTIONS
TESTING
THORIUM COMPOUNDS
TRACER TECHNIQUES
YTTRIUM COMPOUNDS
YTTRIUM ISOTOPES