Assertion: actinium | /r/AtLocation | trace
Facets:
value: in uranium ores
type: LOCATION
value: as the isotope
type: MANNER
value: as 227ac
type: TEMPORAL
Source sentences:
text: Actinium is found only in traces in uranium and thorium ores as the isotope 227Ac, which decays with a half-life of 21.772 years, predominantly emitting beta and sometimes alpha particles, and 228Ac, which is beta active with a half-life of 6.15 hours.
text: Actinium is found only in traces in uranium ores – one tonne of uranium in ore contains about 0.2 milligrams of 227Ac – and in thorium ores, which contain about 5 nanograms of 228Ac per one tonne of thorium.
text: Actinium is found only in traces in uranium ores as the isotope 227Ac, which decays with a half-life of 21.772 years, predominantly emitting beta particles.
text: It is found only in traces in uranium ores.
text: Actinium is found only in traces in uranium and thorium ores as the isotope 227Ac, which decays with a half-life of 21.772 years, predominantly emitting beta and sometimes alpha particles, and 228Ac, which is beta active with a half-life of 6.15 hours.
text: Actinium is found only in traces in uranium ores – one tonne of uranium in ore contains about 0.2 milligrams of 227Ac – and in thorium ores, which contain about 5 nanograms of 228Ac per one tonne of thorium.
text: It is found only in traces in uranium ores as 227Ac, an alpha and beta emitter with a half-life of 21.773 years.
text: Actinium is found only in traces in uranium and thorium ores as the isotope 227Ac, which decays with a half-life of 21.772 years, predominantly emitting betaand sometimes alpha particles, and 228Ac, which is beta active with a half-life of 6.15 hours.