I started purging graphite mirror (and all shutters) with dry nitrogen gas a few years back. No problem since then. Peter
Peter Y. Zavalij X-ray Crystallographic Center University of Maryland Ph/fax: (301)405-1861 www.chem.umd.edu/crystallography<http://www.chem.umd.edu/crystallography> From: rietveld_l-requ...@ill.fr [mailto:rietveld_l-requ...@ill.fr] On Behalf Of Natale Perchiazzi Sent: Tuesday, July 29, 2014 8:48 AM To: lista rietveld Subject: Primary Ge monochromator oxidation Dear All, After observing a loss of intensity in the data collections, I demounted the primary Huber Ge monochromator crystal of my Bruker D8 advance diffractometer, and checking it under a binocular microscope I observed it is oxidized. Somebody who experienced such a mess, eventually have any suggestion on how to fix the problem cleaning up the oxidation? best regards Natale Perchiazzi
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