Awesome. Looks like I will be going with the PC0 then, as unfortunately we don't have the PC1 crystal. I trawled the search of the forum I swear! Found a lot about processing C,O and halogen data, but couldn't find which crystal people generally tend to usually use.
While I am here... what standard/s to people tend to use for O? Would you use a synthetic standards like pyrope, or should you be trying to matrix match as best as you can? Also, have people noticed any systematic peak shift in the Oxygen peak from mineral to mineral, or is the peak maxima too broad to say anything conclusive?
Cheers