>A change since the above page was written is the
>availability(?) of various mirror/capilliary focussing
>systems options to increase flux and specialist
>applications. I have not used a powder diffractometer
>that has these new features though.
Obtaining patterns of reference materials is the only way to
compare the various machine categories. Reflection, transmission,
linear or planar detector, etc. I would be happy to add some
reference patterns to the above pages : from INEL, or the Huber
recent 140° detector seen at EPDIC-7, Barcelona or from any
new system. NIST Al2O3 would be just fine enough. Finding
all qualities in only one diffractometer is hard if not impossible
(resolution, fast recording, no fluorescency, monochromatic
radiation, flux, accuracy, peaks at expected positions which do
not need software for systematic correction...). Some manufacturers
seem unhappy with that idea of giving reference patterns. Yes,
that is curious, you just can't find such essential data...
Best,
Armel Le Bail
http://sdpd.univ-lemans.fr/course/
