Cocrystallization of certain 4f and 5f elements in the bivalent state with alkali metal halides

Journal Article · Thu Jan 01 04:00:00 EST 1987 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:7002429

Mikheev, N B; Kamenskaya, A M; Veleshko, I E; Kulyukhin, S A

The cocrystallization of Fm/sup 2 +/, Es/sup 2 +/, Cf/sup 2 +/, Am/sup 2 +/, Yb/sup 2 +/, Eu/sup 2 +/ and Sr/sup 2 +/ with NaCl, KCl and KBr in tetrahydrofuran (THF), hexamethylphosphorotriamide (HMPA), and ethanol has been studied. It is shown that in water-ethanol medium An/sup 2 +/ cocrystallize with KCl by the formation of anomalous mixed crystals and Ln/sup 2 +/ do not cocrystallize. In HMPA neither Ln/sup 2 +/ nor An/sup 2 +/ are observed to transfer into the KBr solid phase, while in THF both Ln/sup 2 +/ and An/sup 2 +/ cocrystallize with NaCl. The change in the behavior on Ln/sup 2 +/ and An/sup 2 +/ cocrystallize with a change from one solvent to another is caused by the difference in the effective ionic radii of these elements, which arises from the large nephelauxetic effect for An/sup 2 +/ as well as by the different solvating power of these solvents.

• OSTI ID: 7002429
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 29:3; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALI METAL ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
AMERICIUM COMPOUNDS
AQUEOUS SOLUTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BROMIDES
BROMINE COMPOUNDS
CALIFORNIUM COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXOMETRY
COPRECIPITATION
CRYSTALLIZATION
DAYS LIVING RADIOISOTOPES
DISPERSIONS
EINSTEINIUM 253
EINSTEINIUM COMPOUNDS
EINSTEINIUM ISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ETHANOL
EUROPIUM 152
EUROPIUM COMPOUNDS
EUROPIUM ISOTOPES
EVEN-EVEN NUCLEI
FERMIUM 254
FERMIUM COMPOUNDS
FERMIUM ISOTOPES
FURANS
HALIDES
HALOGEN COMPOUNDS
HEAVY NUCLEI
HETEROCYCLIC COMPOUNDS
HOURS LIVING RADIOISOTOPES
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
IODIDES
IODINE COMPOUNDS
ISOTOPE SEPARATION
ISOTOPES
LIGHT NUCLEI
MIXTURES
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SOLVENTS
PHASE TRANSFORMATIONS
POTASSIUM BROMIDES
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
PRECIPITATION
RADIOISOTOPES
RARE EARTH COMPOUNDS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SAMARIUM COMPOUNDS
SAMARIUM IODIDES
SEPARATION PROCESSES
SODIUM 22
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM ISOTOPES
SOLUTIONS
SOLVATION
SOLVENT PROPERTIES
SOLVENTS
STRONTIUM COMPOUNDS
TETRAHYDROFURAN
TRANSPLUTONIUM COMPOUNDS
TRANSURANIUM COMPOUNDS
VALENCE
YEARS LIVING RADIOISOTOPES
YTTERBIUM COMPOUNDS