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Samples for XPS (ESCA)... how much?

Posted by Roberto Bracco  
Roberto Bracco February 20, 2012 10:05AM
Hi all,
I have been suggested to run an XPS / ESCA analysis on a new mineral to have an independent evaluation of oxidation states of elements inside.
Of course... material is very scarce and before sacrificing more crystals it would be great if I could use a grain I already probed for preliminary SEM-EDS work. It is a 30 um crystal mounted on graphite gel and coated with evaporated graphite.
Is there anyone familiar with this technique? Could crystal size and coating be an issue for analysis?
Uwe Kolitsch February 20, 2012 06:41PM
Do you know the crystal structure? If yes, bond-valence calculations might be sufficient.
(What elements are we talking about? Feel free to send PM.)
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