THIRD ANNUAL REPORT ON DISTRIBUTION STUDIES BETWEEN MELTS AND SOLID PHASES USING RADIOACTIVE TRACERS

Technical Report · Sat Jul 31 04:00:00 EDT 1954

DOI:https://doi.org/10.2172/4062709· OSTI ID:4062709

Ward, R; Orr, W C; Katz, L; Bent, H A; Casey, J J; Looby, J T; Bellis, H; Gallagher, C

The distribution of Ce(III) between molten BaCl/sub 2/ and solid BaZrO/ sub 3/ in vacuo at lOOO deg C was studied. Radiotracer experiments in which cerium ranged in concentration from 10/sup -13/ to 18.7 at,% of the cerium- zirconium content showed that essentially none of the cerium remained in the molten phase. X-ray examination of the insoluble residue from the experiments showed the presence of monoclinic and tetragonal zirconia and a tuird phase identified as Ce/sub 2/O/sub 3/ 2ZrO/sub 2/. Ths major reaction occurring in the system was concluded to be 3BaZrO/sub 3/ + 2CeCl/sub 3/ yields Ce/sub 2/O/sub 3/ 2ZrO/sub 2/ + 3BaCl/sub 2/ + ZrO /sub 2/. A new ternary oxide of yttrium and chronnium was prepared and its formula and density determined. Its x-ray powder pattern can be indexed on the basis of a monoclinic cell. This compound and LaCrO/sub 3/ were used as solid phases in preliminary work on the investigation of common ion and foreign ion exchange phenomena. Yttrium 90 was separated from its parent strontium 90 by ion exchange for tracer use in these studies. From a thermodynamic point of view, the problem of predicting the distribution of trace ion between solids and melts is one of evaluating DELTA F deg for the exchange reaction by which equilibrium is attained. A summary of the literature was made with this in mind, and several methods for resolving and evaluating DELTA F deg are proposed. (For preceding period see NYO-3277.) (auth)

• Research Organization: Connecticut. Univ., Storrs
• NSA Number: NSA-15-012793
• OSTI ID: 4062709
• Report Number(s): NYO-3279
• Country of Publication: United States
• Language: English

Related Subjects

BARIUM CHLORIDES
CERIUM
CERIUM CHLORIDES
CERIUM OXIDES
CHEMISTRY
CHROMATES
CHROMIUM OXIDES
DENSITY
DISTRIBUTION
ION EXCHANGE
LANTHANUM COMPOUNDS
MELTING
PREPARATION
QUANTITATIVE ANALYSIS
SOLIDS
STRONTIUM 90
THERMODYNAMICS
TRACER TECHNIQUES
X RADIATION
YTTRIUM 90
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES