Promising materials for Na fixation appear to be Na0.5La0.5TiO3 (see also ), NaZr2(PO4)3 and NaTi2(PO4)3. The latter materials would also probably incorporate 137Cs since isomorphous Cs compounds are reported .
Further leaching data were obtained on nepheline and sodalite and the gross dissolution behavior of a variety of Na-bearing phases was established.
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Vance, E.R., Adl, T. Leaching Studies of Crystalline Sodium Phases in Nuclear Waste Forms. MRS Online Proceedings Library 6, 163–171 (1981). https://doi.org/10.1557/PROC-6-163