Note from Bob von Dreele on POLA
Typically iparm files will have "incorrect" POLA values. You might suggest "good" values for graphite monochromators.
Thus while calculated values can be determined, experimentally determined values may be recommended. Not only for laboratory systems, but also synchrotron data where ideal values might be assumed.
- In this case using cubic annealed Y2O3 (10.6Å - IA3)