Solute Distribution in the Na20-B203-NaC1 System. II. Alkaline Earths and Rare Earths.
Abstract
Radioactive tracers were used to determine the distribution of micro quantities of Ba, Sr, Nd, and Eu between the two conjugate liquid phases throughout the immiscibility region in the system Na2O-B2O3-NaCl at 830C. Phase diagram data and borate/salt distribution coefficients of the solutes were obtained. The distribution coefficients of these cations increase according to their field strengths, in agreement with the previously proposed ion-exchange mechanism for solute distribution. Distribution coefficients are extremely sensitive to phase compositions, and increase with increasing Na2O content, until maxima are reached in the region where the borate network structure begins to break down. Large separation factors exist between the alkali metal, alkaline earth, and rare earth groups. Appreciable intragroup separation factors are also found, the Ba-Sr and Eu-Nd separation factors being about 2.7 and 1.9 respectively. Phase diagram and solute distribution data are correlated with known polyborate structures. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 17, 1964
- Accession Number
- AD0603382
Entities
People
- M. H. Rowell
Organizations
- Naval Radiological Defense Laboratory