[Wien] sgroup: Bb and P-1

[georg at chem.au.dk]

I have a structure in the C2/c space group (monoclinic nr. 15) which I want to
convert to Cc (monoclinic nr 9). This can be done by breaking the center of
symmetry. 
F.inst. I split a position like
--------------------------------------------------------------
ATOM   1: X=0.12500000 Y=0.43750000 Z=0.00000000
          MULT= 4          ISPLIT= 2
       1: X=0.87500000 Y=0.06250000 Z=0.00000000
       1: X=0.87500000 Y=0.56250000 Z=0.00000000
       1: X=0.12500000 Y=0.93750000 Z=0.00000000
Fe1        NPT=  781  R0=0.00005000 RMT=    2.1000   Z: 26.0
--------------------------------------------------------------
Into two positions:
--------------------------------------------------------------
ATOM   1: X=0.12500000 Y=0.43750000 Z=0.00000000
          MULT= 2          ISPLIT= 2
       1: X=0.87500000 Y=0.56250000 Z=0.00000000
Fe1        NPT=  781  R0=0.00005000 RMT=    2.1000   Z: 26.0
ATOM   1: X=0.87500000 Y=0.06250000 Z=0.00000000
          MULT= 2          ISPLIT= 2
       1: X=0.12500000 Y=0.93750000 Z=0.00000000
FeA        NPT=  781  R0=0.00005000 RMT=    2.1000   Z: 26.0
---------------------------------------------------------------
But when I do this sgroup changes the axes and chooses the P-1 space group
instead of the Cc. This is undoubtly correct (and probably also wise because of
the bug for C-centered monoklinic groups) but for other reasons I want to force
sgroup to chose the Cc space group. 
Can I force sgroup to do this somehow?

   Georg
-- 
Georg Madsen
Department of Chemistry
Aarhus University
DK-8000 Århus C
Denmark
tlf (+45) 89423885