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>yes, very little of the He in the universe came from the decay of larger
>nuclei
>however, we can access very little of the He in the universe
>i believe, as i said in my original post, that most of the He that we find
>in an accessible form on earth is found associated with large deposits of
>heavy metals
>but certainly you are correct on are a larger scale
>i am merely trying to address the question of where did the He you buy for
>your tanks probably come from
>and i believe, and have yet to find any evidence against, the theory that
>it is found associated with heavy metal deposits (especially uranium) here
>on earth, and especially in texas (our priamry source of He around here)
>as i said though, i may be wrong
>i am merely stating what i have been told and waiting for an informed
>contradictory opinion
>I have already learned that I was not specific enough, and appreciate the
>clarification
>after all, anyone can post incorrect information
>chemists out there, am i wrong?
>if so, on which points?
>if you can't learn from the net, you're doing something wrong
>thanks for your clarifications
>ted
>
>
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>

He is actually a relatively abundant element.  The helium you buy from air
products is adiabatically removed from air.  I don't believe that the He in
the atmosphere can be accounted for by decay from unstable heavy isotopes
that have ever been present in the earth.  It is much more likely that the
majority of atmospheric He came from cooling intra solar material "as is"
along with the rest of the elemtary makeup up of the earth.  The earth also
recieves a flux of He (along with a variety of other small nuclei,
metastable nuclei fragments, and subatomic particles) from the Sun itself.

You can't make this kind of shit up...


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