**Minimal FWHMs decrease down to 0.06 or even 0.02-0.01°
2-theta.**

**Multiply the maximum volumes**
**(previously listed for minimal FWHM ~ 0.12° 2-theta)**
**by 2 or 6 or 12.**

**This is much more comfortable than with conventional
X-ray data.**

**It can be expected really to play with 150-300 independent
atoms, corresponding to 450-900 xyz refinable parameters.**

**Up to 10000 or more reflections could be extracted
from a synchrotron powder pattern.**

**Triclinic centrosymmetrical cells with up to 6000 Å ^{3}
volume or cubic cells with F lattice as large as 600000 Å^{3}
are the theoretical upper limits which one could expect to attain by using
high resolution synchrotron data !**

**No study has approached such limits up to now.**

**Largest problems solved**
**(up to 60 independent atoms, 180 xyz parameters refined)**
**are already considerable.**

**A list of complex experimental cases already published**
**may be found as a Top
50**
**inside the
SDPD-Databank.**

**The maximal limits suggested for conventional in-laboratory
diffractometers have been already reached without too much difficulties
for triclinic, monoclinic or orthorhombic cells.**

**Consequently, one can predict exceptional results in
a very near future from synchrotron data.**