OccurrenceActinium is found naturally in uranium ores as a decay product [1]:
A tonne of uranium ore contains on average 0.2 g of actinium [1]. IsolationAc can be extracted by ion-exchange or solvent extraction [1].
Reduction of AcF with lithium vapour at 1100-1300 °C [2]: AcF(s) + Li(g) Ac(s) + LiF(s) SynthesisActinium can be made by the neutron bombardment of the radium isotope 226Ra [1]:
At best, Ac can only be synthesized in mg quantities [1]. |