Re: Natural abundance of Plutonium

[rkathren@beta.tricity.wsu.edu (ron kathren)]

For all practical purposes, all plutonium in our world is man-made,
irrespective of what ENCARTA may suggest.  In fact, Glenn Seaborg and his
group, while working on the Pu discover about 1940, spent considerable
effort looking for naturally occuring Pu, and published some papers
regaRDING THIS (See "The Plutonium Story" for more information".  

Ron Kathren

>What is the natural abundance of Plutonium? I was told that the 'Encarta' 
>CD-ROM encyclopedia states that Plutonium occurs naturally within uranium 
>ore. I know that the abundance will be extremely small. Nevertheless, 
>does anyone know what it is?
>
>
>Tim Finney
>Radiation Safety Services
>Perth, Western Australia
>
>