The price of 1 kg uranium octaoxide (U3O8) is approx. 90 US $/kg.
abundance of uranium in the earth crust; 2,5-3 ppm (mg/kg) abundance of uranium in the sea water: ca. 3 ppb (?g/kg)
Uranium concentration in the earth crust: ca. 2,5 ppm (mg/kg) Uranium concentration in the sea water: ca. 3 ppb (micograms/kg)
Less and less as the Uranium decays into lead and other elements.... More and more as super-novae explode and fuse elements into Uranium...
The concentration of uranium in granites is 10-20 mg/kg.
Approx. 150 $/kg for the unrefined oxide U3O8.
Uranium metal (enriched in uranium-235 up to 99 %) is a nuclear explosive, if the critical mass is reached. Also criticality accidents are possible in uranium plants or uranium storage areas.
The concentration of uranium in soils is considered as normal in the range 0,3 μg/kg -- 10 mg/kg.
It is possible because uranium is very expensive.The price of 1 kg of the oxide U3O8 is now approx. 90 US $/kg.
Uranium is expensive in all countries.The price of uranium is approx. 90US $ per kg of oxide U3O8.
Uranium is the most energetic material available today.
Different data in the technical litterature: 0,5-2 μg uranium for each kg of body, per day, for long time (professional) exposure.