we have repeatedly successfully analysed apatite using a conventional
Conditions: 2 bar fluorine pressure; 600?C, reaction time over night.
Conversion to CO2.
Mineralogisch-Petrologisches Institut und Museum
Von: Stable Isotope Geochemistry [mailto:[log in to unmask]]Im
Auftrag von Kevin Faure
Gesendet: Montag, 19. November 2001 04:49
An: [log in to unmask]
Betreff: oxygen isotope analysis of phosphate minerals
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 phosphate.