[sdpd] Reference materials for calibration and indexing

[Armel Le Bail <armel...@fluo.univ-lemans.fr>]

Hi,

The latest addition into PowBase is In2O3, cubic
variety (a=10.119 A; space group Ia3).

http://www.cristal.org/powbase/

This compound would be a nice reference material to be mixed
with your unknown sample for indexing. No preferred
orientation occured on a sample from CERAC Inc.
The minimal FWHM is near of 0.06° (2-theta), without
annealing. Unfortunately, 3 of the 7 first reflections are very
weak. Anyway, this material may replace NAC (Na2Ca3Al2F14)
if you need a more absorbing sample.

Other suggestions of inexpensive reference materials welcome.

Best,

Armel Le Bail
http://www.cristal.org/course/