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Thallium Isotopes

Stable Lanthanum Isotopes - La Isotopes
Nominal mass Accurate
mass
% Natural abundance Chemical form Enrichment available %

138La 137.907105 (6) 0.09 (1) Oxide 6 - 11+

139La 138.906347 (5) 99.91 (1) Oxide 99+
 
Both Lanthanum Isotopes do not appear to have many applications. Only La-139 is used for the production of the medical radioisotope Ce-139.
 
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