Problem with space group 166 (R-3m)

Total energy, geometry optimization, DFT+U, spin....

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mab
Posts: 9
Joined: Sun Nov 13, 2011 2:38 pm

Problem with space group 166 (R-3m)

Post by mab » Sun Jan 29, 2012 9:34 pm

Hi Abinit users,
All the time when i use this structure and this atomic positions Abinit poster an error message (look below).
Thank you for your help
Mab
----------------------------
natom 2
ntypat 2
znucl 8 29
typat 1 2
acell 8.0 8.0 30.0
spgroup 166
spgaxor 1
spgorig 1
brvltt 7
angdeg 90 90 120
xred
0.0 0.0 0.0
0.0 0.0 1/4
------------------------------
chkprimit : ERROR -
According to the symmetry finder, the unit cell is
NOT primitive. The multiplicity is 3 .
The use of non-primitive unit cells is allowed
only when the input variable chkprim is 0.
Action : either change your unit cell (rprim or angdeg),
or set chkprim to 0.
ABINIT

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jzwanzig
Posts: 504
Joined: Mon Aug 17, 2009 9:25 am

Re: Problem with space group 166 (R-3m)

Post by jzwanzig » Tue Jan 31, 2012 5:27 pm

Try brvltt -1 and let abinit find the primitive cell (I think you've input the conventional, hexagonal cell).
Josef W. Zwanziger
Professor, Department of Chemistry
Canada Research Chair in NMR Studies of Materials
Dalhousie University
Halifax, NS B3H 4J3 Canada
jzwanzig@gmail.com

mab
Posts: 9
Joined: Sun Nov 13, 2011 2:38 pm

Re: Problem with space group 166 (R-3m)

Post by mab » Sat Feb 04, 2012 3:27 pm

It s ok, Thank you

Mab

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