Physics
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995gecoa..59.5103g&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 59, Issue 24, pp.5103-5111
Physics
1
Scientific paper
Distribution coefficients for radium in heterogeneous equilibrium with gypsum and calcite were determined with solid solutions containing Ra in the mole fraction range 10 -10 to 10 -7 at 25 ± 3°C. The correlation approach of Langmuir and Riese for predicting empirical distribution coefficients is improved when a term for the elastic strain energy is included for the case in which the Ca atom is replaced by the larger Ra atom. A method is described in which distribution coefficients can be estimated and applied in geochemical equilibrium models to account for Ra incorporation into sulfates, carbonates, and halides when radium-containing wastes are chemically treated. It is suggested that the method may have application to radium-containing minerals, in general.
Gnanapragasam Emmanuel K.
Lewis Barbara-Ann G.
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