I have made analysis of monazite oxygen isotope with
BrF5, it is successful over high T(>500)
--- Kevin Faure <[log in to unmask]> wrote:
> Dear Listmembers
> To measure O-isotope ratios of biogenic phosphates
> one has to first
> chemically isolate the material as silver phosphate.
> I can understand
> why this treatment is necessary for biogenic
> phopshate, but is this
> necessary for phosphate minerals (apatite, monazite
> and xenotime)? I
> would be interested to hear if anyone has
> successfully or
> unsuccessfully extracted oxygen from phosphate
> minerals by either CO2
> laser ablation (+BrF5) or conventional extraction
> for 18/16O
> analysis, without first converting to silver
> Kevin Faure
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