Trisrota,
Not from EMP data alone. In an anhydrous system one could assume
analytical totals of 100% and back out the U6+/U4+ if usinq Quant WDS
for U alone on a well polished sample of microscale size. But given
submicroscopic heterogenities, variable H2O, and metamict material,
good luck. Some problems weren't made to be done with EMPA. The idea
af getting quant O with WDS on an actinide directly without systematic
errors is mindboggling.
cheers,
eric
On Feb 12, 2010, at 12:17 AM, LOST IN THE ASHES OF TIME wrote:
> Dear All,
> I am a M.Sc final year student of Applied Geology and doing my M.Sc
> dissertation in which one part involves Uranium geochemistry in
> Singhbhum Shear Zone, India. I beg your kind help regarding depicted
> below.
> Can anyone please guide me about how to calculate the excess oxygen
> in Uraninite formula? The oxidation of U (+4) produces some U (+6)
> and adds excess oxygen and hence departs from it's ideal
> stoichiometry UO2. Is there any way to determine or recalculate this
> excess Oxygen from EPMA data (considering U as in only +4 state)?
> Please help me.
> Regards,
> Trisrota.
>
>
>
> Trisrota Chaudhuri,
> M.Sc (2nd year),
> Dept of Geological Sciences,
> Jadavpur University,
> India.
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